Document:

Exhibit 10.2

 

May 9, 2019

 

Health Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

 

Chardan Capital Markets LLC

17 State Street

New York, NY 10004

 

Re: Initial Public Offering

 

Ladies and Gentlemen:

 

This letter (the “Letter Agreement”)
is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”)
entered into by and between Health Sciences Acquisitions Corporation, a Delaware corporation (the “Company”)
and Chardan Capital Markets LLC (the “Representative”), relating to an underwritten initial public offering
(the “IPO”) of the Company’s units (the “Units”), each Unit comprised
of one share of common stock of the Company, par value $0.0001 per share (the “Common Stock”), and one
redeemable warrant, each whole warrant exercisable for one-half of one share of Common Stock (each, a “Warrant”).
Certain capitalized terms used herein are defined in paragraph 12 hereof.

 

In order to induce the Company and the
Representative to enter into the Underwriting Agreement and to proceed with the IPO, and in recognition of the benefit that such
IPO will confer upon the undersigned, and for other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the undersigned hereby agrees with the Company as follows:

 

		1.	If the Company solicits approval of its shareholders of a Business Combination, the undersigned
will vote all shares beneficially owned by him or her, whether acquired before, in or after the IPO, in favor of such Business
Combination.

 

		2.	In the event that the Company fails to consummate a Business Combination within the time period
set forth in the Company’s amended and restated certificate of incorporation, as the same may be further amended from time
to time (the “Charter”), the undersigned will, as promptly as possible, take all necessary actions to
cause the Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible, but
not more than 10 business days thereafter, redeem the IPO Shares, at a per-share price, payable in cash, equal to the aggregate
amount then on deposit in the Trust Account, including interest earned on the Trust Account not previously released to the Company
(less taxes payable), divided by the number of then outstanding IPO Shares, which redemption will completely extinguish public
shareholders’ rights as shareholders (including the right to receive further liquidation distributions, if any), and (iii)
as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining shareholders
and the Company’s board of directors, dissolve and liquidate, subject in the cases of clauses (ii) and (iii) to the Company’s
obligations under Delaware law to provide for claims of creditors and other requirements of applicable law. The undersigned hereby
waives any and all right, title, interest or claim of any kind in or to any distribution of the Trust Account and any remaining
net assets of the Company as a result of such liquidation with respect to the Founder Shares owned by the undersigned. However,
if any of the undersigned have acquired IPO Shares in or after the IPO, they will be entitled to liquidating distributions from
the Trust Account with respect to such IPO Shares in the event that the Company fails to consummate a Business Combination within
the time period set forth in the Charter. The undersigned acknowledges and agrees that there will be no distribution from the Trust
Account with respect to any Warrants, all rights of which will terminate on the Company’s liquidation.

 

    

    

    

 

		3.	The undersigned acknowledges and agrees that prior to entering into a definitive agreement for
a Business Combination with a target business that is affiliated with the undersigned or any other Insiders of the Company or their
affiliates, such transaction must be approved by a majority of the Company’s disinterested independent directors and the
Company must obtain an opinion from an independent investment banking firm, which is a member of the Financial Industry Regulatory
Authority, or an independent accounting firm that such Business Combination is fair to the Company’s unaffiliated shareholders
from a financial point of view.

 

		4.	None of the undersigned, any member of the family of any of the undersigned, or any affiliate of
the undersigned will be entitled to receive and will not accept any compensation or other cash payment prior to, or for services
rendered in order to effectuate, the consummation of the Business Combination; provided that the Company shall be allowed to make
the payments set forth in the Registration Statement adjacent to the caption “Prospectus Summary—The Offering—Limited
payments to insiders.”

 

		5.	

 

		(a)	In order to minimize potential conflicts of interest that may arise from multiple corporate affiliations,
the undersigned hereby agrees that until the earliest of the Company’s initial Business Combination or liquidation, the undersigned
shall present to the Company for its consideration, prior to presentation to any other entity, any target business that has a fair
market value of at least 80% of the assets held in the Trust Account (excluding the amount of deferred underwriting discounts held
in trust and taxes payable on the interest earned on the trust account), subject to any existing or future fiduciary or contractual
obligations the undersigned might have.

 

		(b)	The undersigned hereby agrees and acknowledges that (i) the Representative and the Company would
be irreparably injured in the event of a breach of the obligations under paragraph 6(a) above, (ii) monetary damages may not be
an adequate remedy for such breach and (iii) the non-breaching party shall be entitled to injunctive relief, in addition to any
other remedy that such party may have in law or in equity, in the event of such breach.

 

		6.	The undersigned agrees to be a director or officer of the Company, as applicable, until the earlier
of the consummation by the Company of an initial Business Combination or the liquidation of the Company. The undersigned’s
biographical information previously furnished to the Company and the Representative is true and accurate in all material respects,
does not omit any material information with respect to the undersigned’s background and contains all of the information required
to be disclosed pursuant to Item 401 of Regulation S-K, promulgated under the Securities Act of 1933, as amended. The undersigned’s
FINRA Questionnaire previously furnished to the Company and the Representative is true and accurate in all material respects. The
undersigned represents and warrants that:

 

		(a)	He or she is not subject to, or a respondent in, any legal action for, any injunction, cease-and-desist
order or order or stipulation to desist or refrain from any act or practice relating to the offering of securities in any jurisdiction;

 

		(b)	He or she has never been convicted of or pleaded guilty to any crime (i) involving any fraud or
(ii) relating to any financial transaction or handling of funds of another person, or (iii) pertaining to any dealings in any securities
and he is not currently a defendant in any such criminal proceeding; and

 

		(c)	he or she has never been suspended or expelled from membership in any securities or commodities
exchange or association or had a securities or commodities license or registration denied, suspended or revoked.

 

		7.	The undersigned has full right and power, without violating any agreement by which he or she is
bound, to enter into this Letter Agreement and to serve as a director or officer of the Company, as applicable.

 

		8.	The undersigned hereby waives his or her right to exercise redemption rights with respect to any
of the Company’s Common Stock owned or to be owned by the undersigned, directly or indirectly, whether such shares be part
of the Founder Shares or IPO Shares, and agrees that he or she will not seek redemption with respect to such shares (or sell such
shares to the Company in any tender offer) in connection with any vote to approve a Business Combination.

 

    2

    

    

 

		9.	The undersigned hereby agrees to not propose, or vote in favor of, an amendment to Article 6 of
the Charter prior to the consummation of a Business Combination unless the Company provides public shareholders with the opportunity
to redeem their IPO Shares upon such approval in accordance with such Article 6 thereof.

 

		10.	The undersigned agrees not to participate in the formation of, or become an officer or director
of, any other blank check company (excluding existing affiliations), until the Company has entered into a definitive agreement
with respect to an initial Business Combination or the Company has failed to complete an initial Business Combination within the
time period set forth in the Charter.

 

		11.	This Letter Agreement shall be governed by and construed and enforced in accordance with the laws
of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive
laws of another jurisdiction. The undersigned hereby (i) agrees that any action, proceeding or claim against him arising out of
or relating in any way to this Letter Agreement shall be brought and enforced in the courts of the State of New York of the United
States of America for the Southern District of New York, and irrevocably submits to such jurisdiction, which jurisdiction shall
be exclusive and (ii) waives any objection to such exclusive jurisdiction and that such courts represent an inconvenient forum.

 

		12.	As used herein, (i) a “Business Combination” shall mean a merger, share
exchange, asset acquisition, stock purchase, recapitalization, reorganization or other similar business combination with one or
more businesses or entities; (ii) “Insiders” shall mean all officers, directors and sponsors of the Company
immediately prior to the IPO; (iii) “Founder Shares” shall mean the 2,875,000 shares of Common Stock
of the Company acquired by the Sponsor prior to the IPO; (iv) “IPO Shares” shall mean the shares of Common
Stock issued in the Company’s IPO; (v) “Private Placement Warrants” shall mean the warrants that
are being sold privately by the Company simultaneously with the consummation of the IPO; (vi) “Trust Account”
shall mean the trust account into which the net proceeds of the Company’s IPO and a portion of the proceeds from the sale
of the Private Placement Warrants will be deposited; and (vii) “Registration Statement” means the Company’s
registration statement on Form S-1 (SEC File No. 333-230893) filed with the Securities and Exchange Commission, as amended.

 

		13.	This Letter Agreement constitutes the entire agreement and understanding of the parties hereto
in respect of the subject matter hereof and supersedes all prior understandings, agreements, or representations by or among the
parties hereto, written or oral, to the extent they relate in any way to the subject matter hereof or the transactions contemplated
hereby. This Letter Agreement may not be changed, amended, modified or waived (other than to correct a typographical error) as
to any particular provision, except by a written instrument executed by all parties hereto.

 

		14.	The undersigned acknowledges and understands that the Representative and the Company will rely
upon the agreements, representations and warranties set forth herein in proceeding with the IPO. Nothing contained herein shall
be deemed to render the any Representative a representative of, or a fiduciary with respect to, the Company, its shareholders or
any creditor or vendor of the Company with respect to the subject matter hereof.

 

		15.	This Letter Agreement shall be binding on the undersigned and such person’s respective successors,
heirs, personal representatives and assigns. This Letter Agreement shall terminate on the earlier of (i) the consummation of a
Business Combination and (ii) the liquidation of the Company; provided that such termination shall not relieve the undersigned
from liability for any breach of this agreement prior to its termination. The parties hereto may not assign either this Letter
Agreement or any of their rights, interests, or obligations hereunder without the prior written consent of the other party. Any
purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any
interest or title to the purported assignee.

 

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[Signature Page Follows]

 

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	 	Sincerely,
	 	By:	/s/ Alice Lee
	 	 	Name of Insider: Alice Lee

 

	 	Acknowledged and Agreed:
	 	Health Sciences Acquisitions Corporation
	 	By:	/s/ Roderick Wong
	 	 	Name: Roderick Wong, MD
	 	 	Title: President

 

    

    

    

 

May 9, 2019

 

Health Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

 

Chardan Capital Markets LLC

17 State Street

New York, NY 10004

 

Re: Initial Public Offering

 

Ladies and Gentlemen:

 

This letter (the “Letter Agreement”)
is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”)
entered into by and between Health Sciences Acquisitions Corporation, a Delaware corporation (the “Company”)
and Chardan Capital Markets LLC (the “Representative”), relating to an underwritten initial public offering
(the “IPO”) of the Company’s units (the “Units”), each Unit comprised
of one share of common stock of the Company, par value $0.0001 per share (the “Common Stock”), and one
redeemable warrant, each whole warrant exercisable for one-half of one share of Common Stock (each, a “Warrant”).
Certain capitalized terms used herein are defined in paragraph 12 hereof.

 

In order to induce the Company and the
Representative to enter into the Underwriting Agreement and to proceed with the IPO, and in recognition of the benefit that such
IPO will confer upon the undersigned, and for other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the undersigned hereby agrees with the Company as follows:

 

		1.	If the Company solicits approval of its shareholders of a Business Combination, the undersigned
will vote all shares beneficially owned by him or her, whether acquired before, in or after the IPO, in favor of such Business
Combination.

 

		2.	In the event that the Company fails to consummate a Business Combination within the time period
set forth in the Company’s amended and restated certificate of incorporation, as the same may be further amended from time
to time (the “Charter”), the undersigned will, as promptly as possible, take all necessary actions to
cause the Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible, but
not more than 10 business days thereafter, redeem the IPO Shares, at a per-share price, payable in cash, equal to the aggregate
amount then on deposit in the Trust Account, including interest earned on the Trust Account not previously released to the Company
(less taxes payable), divided by the number of then outstanding IPO Shares, which redemption will completely extinguish public
shareholders’ rights as shareholders (including the right to receive further liquidation distributions, if any), and (iii)
as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining shareholders
and the Company’s board of directors, dissolve and liquidate, subject in the cases of clauses (ii) and (iii) to the Company’s
obligations under Delaware law to provide for claims of creditors and other requirements of applicable law. The undersigned hereby
waives any and all right, title, interest or claim of any kind in or to any distribution of the Trust Account and any remaining
net assets of the Company as a result of such liquidation with respect to the Founder Shares owned by the undersigned. However,
if any of the undersigned have acquired IPO Shares in or after the IPO, they will be entitled to liquidating distributions from
the Trust Account with respect to such IPO Shares in the event that the Company fails to consummate a Business Combination within
the time period set forth in the Charter. The undersigned acknowledges and agrees that there will be no distribution from the Trust
Account with respect to any Warrants, all rights of which will terminate on the Company’s liquidation.

 

    

    

    

 

		3.	The undersigned acknowledges and agrees that prior to entering into a definitive agreement for
a Business Combination with a target business that is affiliated with the undersigned or any other Insiders of the Company or their
affiliates, such transaction must be approved by a majority of the Company’s disinterested independent directors and the
Company must obtain an opinion from an independent investment banking firm, which is a member of the Financial Industry Regulatory
Authority, or an independent accounting firm that such Business Combination is fair to the Company’s unaffiliated shareholders
from a financial point of view.

 

		4.	None of the undersigned, any member of the family of any of the undersigned, or any affiliate of
the undersigned will be entitled to receive and will not accept any compensation or other cash payment prior to, or for services
rendered in order to effectuate, the consummation of the Business Combination; provided that the Company shall be allowed to make
the payments set forth in the Registration Statement adjacent to the caption “Prospectus Summary—The Offering—Limited
payments to insiders.”

 

		5.	

 

		(a)	In order to minimize potential conflicts of interest that may arise from multiple corporate affiliations,
the undersigned hereby agrees that until the earliest of the Company’s initial Business Combination or liquidation, the undersigned
shall present to the Company for its consideration, prior to presentation to any other entity, any target business that has a fair
market value of at least 80% of the assets held in the Trust Account (excluding the amount of deferred underwriting discounts held
in trust and taxes payable on the interest earned on the trust account), subject to any existing or future fiduciary or contractual
obligations the undersigned might have.

 

		(b)	The undersigned hereby agrees and acknowledges that (i) the Representative and the Company would
be irreparably injured in the event of a breach of the obligations under paragraph 6(a) above, (ii) monetary damages may not be
an adequate remedy for such breach and (iii) the non-breaching party shall be entitled to injunctive relief, in addition to any
other remedy that such party may have in law or in equity, in the event of such breach.

 

		6.	The undersigned agrees to be a director or officer of the Company, as applicable, until the earlier
of the consummation by the Company of an initial Business Combination or the liquidation of the Company. The undersigned’s
biographical information previously furnished to the Company and the Representative is true and accurate in all material respects,
does not omit any material information with respect to the undersigned’s background and contains all of the information required
to be disclosed pursuant to Item 401 of Regulation S-K, promulgated under the Securities Act of 1933, as amended. The undersigned’s
FINRA Questionnaire previously furnished to the Company and the Representative is true and accurate in all material respects. The
undersigned represents and warrants that:

 

		(a)	He or she is not subject to, or a respondent in, any legal action for, any injunction, cease-and-desist
order or order or stipulation to desist or refrain from any act or practice relating to the offering of securities in any jurisdiction;

 

		(b)	He or she has never been convicted of or pleaded guilty to any crime (i) involving any fraud or
(ii) relating to any financial transaction or handling of funds of another person, or (iii) pertaining to any dealings in any securities
and he is not currently a defendant in any such criminal proceeding; and

 

		(c)	he or she has never been suspended or expelled from membership in any securities or commodities
exchange or association or had a securities or commodities license or registration denied, suspended or revoked.

 

		7.	The undersigned has full right and power, without violating any agreement by which he or she is
bound, to enter into this Letter Agreement and to serve as a director or officer of the Company, as applicable.

 

		8.	The undersigned hereby waives his or her right to exercise redemption rights with respect to any
of the Company’s Common Stock owned or to be owned by the undersigned, directly or indirectly, whether such shares be part
of the Founder Shares or IPO Shares, and agrees that he or she will not seek redemption with respect to such shares (or sell such
shares to the Company in any tender offer) in connection with any vote to approve a Business Combination.

 

    2

    

    

 

		9.	The undersigned hereby agrees to not propose, or vote in favor of, an amendment to Article 6 of
the Charter prior to the consummation of a Business Combination unless the Company provides public shareholders with the opportunity
to redeem their IPO Shares upon such approval in accordance with such Article 6 thereof.

 

		10.	The undersigned agrees not to participate in the formation of, or become an officer or director
of, any other blank check company (excluding existing affiliations), until the Company has entered into a definitive agreement
with respect to an initial Business Combination or the Company has failed to complete an initial Business Combination within the
time period set forth in the Charter.

 

		11.	This Letter Agreement shall be governed by and construed and enforced in accordance with the laws
of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive
laws of another jurisdiction. The undersigned hereby (i) agrees that any action, proceeding or claim against him arising out of
or relating in any way to this Letter Agreement shall be brought and enforced in the courts of the State of New York of the United
States of America for the Southern District of New York, and irrevocably submits to such jurisdiction, which jurisdiction shall
be exclusive and (ii) waives any objection to such exclusive jurisdiction and that such courts represent an inconvenient forum.

 

		12.	As used herein, (i) a “Business Combination” shall mean a merger, share
exchange, asset acquisition, stock purchase, recapitalization, reorganization or other similar business combination with one or
more businesses or entities; (ii) “Insiders” shall mean all officers, directors and sponsors of the Company
immediately prior to the IPO; (iii) “Founder Shares” shall mean the 2,875,000 shares of Common Stock
of the Company acquired by the Sponsor prior to the IPO; (iv) “IPO Shares” shall mean the shares of Common
Stock issued in the Company’s IPO; (v) “Private Placement Warrants” shall mean the warrants that
are being sold privately by the Company simultaneously with the consummation of the IPO; (vi) “Trust Account”
shall mean the trust account into which the net proceeds of the Company’s IPO and a portion of the proceeds from the sale
of the Private Placement Warrants will be deposited; and (vii) “Registration Statement” means the Company’s
registration statement on Form S-1 (SEC File No. 333-230893) filed with the Securities and Exchange Commission, as amended.

 

		13.	This Letter Agreement constitutes the entire agreement and understanding of the parties hereto
in respect of the subject matter hereof and supersedes all prior understandings, agreements, or representations by or among the
parties hereto, written or oral, to the extent they relate in any way to the subject matter hereof or the transactions contemplated
hereby. This Letter Agreement may not be changed, amended, modified or waived (other than to correct a typographical error) as
to any particular provision, except by a written instrument executed by all parties hereto.

 

		14.	The undersigned acknowledges and understands that the Representative and the Company will rely
upon the agreements, representations and warranties set forth herein in proceeding with the IPO. Nothing contained herein shall
be deemed to render the any Representative a representative of, or a fiduciary with respect to, the Company, its shareholders or
any creditor or vendor of the Company with respect to the subject matter hereof.

 

		15.	This Letter Agreement shall be binding on the undersigned and such person’s respective successors,
heirs, personal representatives and assigns. This Letter Agreement shall terminate on the earlier of (i) the consummation of a
Business Combination and (ii) the liquidation of the Company; provided that such termination shall not relieve the undersigned
from liability for any breach of this agreement prior to its termination. The parties hereto may not assign either this Letter
Agreement or any of their rights, interests, or obligations hereunder without the prior written consent of the other party. Any
purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any
interest or title to the purported assignee.

 

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[Signature Page Follows]

 

    4

    

    

 

	 	Sincerely,
	 	By:	/s/ George Migausky
	 	 	Name of Insider: George Migausky

 

	 	Acknowledged and Agreed:
	 	Health Sciences Acquisitions Corporation
	 	By:	/s/ Roderick Wong
	 	 	Name: Roderick Wong, MD
	 	 	Title: President

 

    

    

    

 

May 9, 2019

 

Health Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

 

Chardan Capital Markets LLC

17 State Street

New York, NY 10004

 

Re: Initial Public Offering

 

Ladies and Gentlemen:

 

This letter (the “Letter Agreement”)
is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”)
entered into by and between Health Sciences Acquisitions Corporation, a Delaware corporation (the “Company”)
and Chardan Capital Markets LLC (the “Representative”), relating to an underwritten initial public offering
(the “IPO”) of the Company’s units (the “Units”), each Unit comprised
of one share of common stock of the Company, par value $0.0001 per share (the “Common Stock”), and one
redeemable warrant, each whole warrant exercisable for one-half of one share of Common Stock (each, a “Warrant”).
Certain capitalized terms used herein are defined in paragraph 12 hereof.

 

In order to induce the Company and the
Representative to enter into the Underwriting Agreement and to proceed with the IPO, and in recognition of the benefit that such
IPO will confer upon the undersigned, and for other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the undersigned hereby agrees with the Company as follows:

 

		1.	If the Company solicits approval of its shareholders of a Business Combination, the undersigned
will vote all shares beneficially owned by him or her, whether acquired before, in or after the IPO, in favor of such Business
Combination.

 

		2.	In the event that the Company fails to consummate a Business Combination within the time period
set forth in the Company’s amended and restated certificate of incorporation, as the same may be further amended from time
to time (the “Charter”), the undersigned will, as promptly as possible, take all necessary actions to
cause the Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible, but
not more than 10 business days thereafter, redeem the IPO Shares, at a per-share price, payable in cash, equal to the aggregate
amount then on deposit in the Trust Account, including interest earned on the Trust Account not previously released to the Company
(less taxes payable), divided by the number of then outstanding IPO Shares, which redemption will completely extinguish public
shareholders’ rights as shareholders (including the right to receive further liquidation distributions, if any), and (iii)
as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining shareholders
and the Company’s board of directors, dissolve and liquidate, subject in the cases of clauses (ii) and (iii) to the Company’s
obligations under Delaware law to provide for claims of creditors and other requirements of applicable law. The undersigned hereby
waives any and all right, title, interest or claim of any kind in or to any distribution of the Trust Account and any remaining
net assets of the Company as a result of such liquidation with respect to the Founder Shares owned by the undersigned. However,
if any of the undersigned have acquired IPO Shares in or after the IPO, they will be entitled to liquidating distributions from
the Trust Account with respect to such IPO Shares in the event that the Company fails to consummate a Business Combination within
the time period set forth in the Charter. The undersigned acknowledges and agrees that there will be no distribution from the Trust
Account with respect to any Warrants, all rights of which will terminate on the Company’s liquidation.

 

    

    

    

 

		3.	The undersigned acknowledges and agrees that prior to entering into a definitive agreement for
a Business Combination with a target business that is affiliated with the undersigned or any other Insiders of the Company or their
affiliates, such transaction must be approved by a majority of the Company’s disinterested independent directors and the
Company must obtain an opinion from an independent investment banking firm, which is a member of the Financial Industry Regulatory
Authority, or an independent accounting firm that such Business Combination is fair to the Company’s unaffiliated shareholders
from a financial point of view.

 

		4.	None of the undersigned, any member of the family of any of the undersigned, or any affiliate of
the undersigned will be entitled to receive and will not accept any compensation or other cash payment prior to, or for services
rendered in order to effectuate, the consummation of the Business Combination; provided that the Company shall be allowed to make
the payments set forth in the Registration Statement adjacent to the caption “Prospectus Summary—The Offering—Limited
payments to insiders.”

 

		5.	

 

		(a)	In order to minimize potential conflicts of interest that may arise from multiple corporate affiliations,
the undersigned hereby agrees that until the earliest of the Company’s initial Business Combination or liquidation, the undersigned
shall present to the Company for its consideration, prior to presentation to any other entity, any target business that has a fair
market value of at least 80% of the assets held in the Trust Account (excluding the amount of deferred underwriting discounts held
in trust and taxes payable on the interest earned on the trust account), subject to any existing or future fiduciary or contractual
obligations the undersigned might have.

 

		(b)	The undersigned hereby agrees and acknowledges that (i) the Representative and the Company would
be irreparably injured in the event of a breach of the obligations under paragraph 6(a) above, (ii) monetary damages may not be
an adequate remedy for such breach and (iii) the non-breaching party shall be entitled to injunctive relief, in addition to any
other remedy that such party may have in law or in equity, in the event of such breach.

 

		6.	The undersigned agrees to be a director or officer of the Company, as applicable, until the earlier
of the consummation by the Company of an initial Business Combination or the liquidation of the Company. The undersigned’s
biographical information previously furnished to the Company and the Representative is true and accurate in all material respects,
does not omit any material information with respect to the undersigned’s background and contains all of the information required
to be disclosed pursuant to Item 401 of Regulation S-K, promulgated under the Securities Act of 1933, as amended. The undersigned’s
FINRA Questionnaire previously furnished to the Company and the Representative is true and accurate in all material respects. The
undersigned represents and warrants that:

 

		(a)	He or she is not subject to, or a respondent in, any legal action for, any injunction, cease-and-desist
order or order or stipulation to desist or refrain from any act or practice relating to the offering of securities in any jurisdiction;

 

		(b)	He or she has never been convicted of or pleaded guilty to any crime (i) involving any fraud or
(ii) relating to any financial transaction or handling of funds of another person, or (iii) pertaining to any dealings in any securities
and he is not currently a defendant in any such criminal proceeding; and

 

		(c)	he or she has never been suspended or expelled from membership in any securities or commodities
exchange or association or had a securities or commodities license or registration denied, suspended or revoked.

 

		7.	The undersigned has full right and power, without violating any agreement by which he or she is
bound, to enter into this Letter Agreement and to serve as a director or officer of the Company, as applicable.

 

		8.	The undersigned hereby waives his or her right to exercise redemption rights with respect to any
of the Company’s Common Stock owned or to be owned by the undersigned, directly or indirectly, whether such shares be part
of the Founder Shares or IPO Shares, and agrees that he or she will not seek redemption with respect to such shares (or sell such
shares to the Company in any tender offer) in connection with any vote to approve a Business Combination.

 

    2

    

    

 

		9.	The undersigned hereby agrees to not propose, or vote in favor of, an amendment to Article 6 of
the Charter prior to the consummation of a Business Combination unless the Company provides public shareholders with the opportunity
to redeem their IPO Shares upon such approval in accordance with such Article 6 thereof.

 

		10.	The undersigned agrees not to participate in the formation of, or become an officer or director
of, any other blank check company (excluding existing affiliations), until the Company has entered into a definitive agreement
with respect to an initial Business Combination or the Company has failed to complete an initial Business Combination within the
time period set forth in the Charter.

 

		11.	This Letter Agreement shall be governed by and construed and enforced in accordance with the laws
of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive
laws of another jurisdiction. The undersigned hereby (i) agrees that any action, proceeding or claim against him arising out of
or relating in any way to this Letter Agreement shall be brought and enforced in the courts of the State of New York of the United
States of America for the Southern District of New York, and irrevocably submits to such jurisdiction, which jurisdiction shall
be exclusive and (ii) waives any objection to such exclusive jurisdiction and that such courts represent an inconvenient forum.

 

		12.	As used herein, (i) a “Business Combination” shall mean a merger, share
exchange, asset acquisition, stock purchase, recapitalization, reorganization or other similar business combination with one or
more businesses or entities; (ii) “Insiders” shall mean all officers, directors and sponsors of the Company
immediately prior to the IPO; (iii) “Founder Shares” shall mean the 2,875,000 shares of Common Stock
of the Company acquired by the Sponsor prior to the IPO; (iv) “IPO Shares” shall mean the shares of Common
Stock issued in the Company’s IPO; (v) “Private Placement Warrants” shall mean the warrants that
are being sold privately by the Company simultaneously with the consummation of the IPO; (vi) “Trust Account”
shall mean the trust account into which the net proceeds of the Company’s IPO and a portion of the proceeds from the sale
of the Private Placement Warrants will be deposited; and (vii) “Registration Statement” means the Company’s
registration statement on Form S-1 (SEC File No. 333-230893) filed with the Securities and Exchange Commission, as amended.

 

		13.	This Letter Agreement constitutes the entire agreement and understanding of the parties hereto
in respect of the subject matter hereof and supersedes all prior understandings, agreements, or representations by or among the
parties hereto, written or oral, to the extent they relate in any way to the subject matter hereof or the transactions contemplated
hereby. This Letter Agreement may not be changed, amended, modified or waived (other than to correct a typographical error) as
to any particular provision, except by a written instrument executed by all parties hereto.

 

		14.	The undersigned acknowledges and understands that the Representative and the Company will rely
upon the agreements, representations and warranties set forth herein in proceeding with the IPO. Nothing contained herein shall
be deemed to render the any Representative a representative of, or a fiduciary with respect to, the Company, its shareholders or
any creditor or vendor of the Company with respect to the subject matter hereof.

 

		15.	This Letter Agreement shall be binding on the undersigned and such person’s respective successors,
heirs, personal representatives and assigns. This Letter Agreement shall terminate on the earlier of (i) the consummation of a
Business Combination and (ii) the liquidation of the Company; provided that such termination shall not relieve the undersigned
from liability for any breach of this agreement prior to its termination. The parties hereto may not assign either this Letter
Agreement or any of their rights, interests, or obligations hereunder without the prior written consent of the other party. Any
purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any
interest or title to the purported assignee.

 

    3

    

    

 

[Signature Page Follows]

 

    4

    

    

 

	 	Sincerely,
	 	By:	/s/ Gotham Makker
	 	 	Name of Insider: Gotham Makker, MD

 

	 	Acknowledged and Agreed:
	 	Health Sciences Acquisitions Corporation
	 	By:	/s/ Roderick Wong
	 	 	Name: Roderick Wong, MD
	 	 	Title: President

 

    

    

    

 

May
9, 2019

 

Health
Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

 

Chardan
Capital Markets LLC

17 State Street

New York, NY 10004

 

Re:
Initial Public Offering

 

Ladies
and Gentlemen:

 

This
letter (the “Letter Agreement”) is being delivered to you in accordance with the Underwriting Agreement
(the “Underwriting Agreement”) entered into by and between Health Sciences Acquisitions Corporation,
a Delaware corporation (the “Company”) and Chardan Capital Markets LLC (the “Representative”),
relating to an underwritten initial public offering (the “IPO”) of the Company’s units (the “Units”),
each Unit comprised of one share of common stock of the Company, par value $0.0001 per share (the “Common Stock”),
and one redeemable warrant, each whole warrant exercisable for one-half of one share of Common Stock (each, a “Warrant”).
Certain capitalized terms used herein are defined in paragraph 12 hereof.

 

In
order to induce the Company and the Representative to enter into the Underwriting Agreement and to proceed with the IPO, and in
recognition of the benefit that such IPO will confer upon the undersigned, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the undersigned hereby agrees with the Company as follows:

 

		1.	If
                                         the Company solicits approval of its shareholders of a Business Combination, the undersigned
                                         will vote all shares beneficially owned by him or her, whether acquired before, in or
                                         after the IPO, in favor of such Business Combination.

 

		2.	In
                                         the event that the Company fails to consummate a Business Combination within the time
                                         period set forth in the Company’s amended and restated certificate of incorporation,
                                         as the same may be further amended from time to time (the “Charter”),
                                         the undersigned will, as promptly as possible, take all necessary actions to cause the
                                         Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly
                                         as reasonably possible, but not more than 10 business days thereafter, redeem the IPO
                                         Shares, at a per-share price, payable in cash, equal to the aggregate amount then on
                                         deposit in the Trust Account, including interest earned on the Trust Account not previously
                                         released to the Company (less taxes payable), divided by the number of then outstanding
                                         IPO Shares, which redemption will completely extinguish public shareholders’ rights
                                         as shareholders (including the right to receive further liquidation distributions, if
                                         any), and (iii) as promptly as reasonably possible following such redemption, subject
                                         to the approval of the Company’s remaining shareholders and the Company’s
                                         board of directors, dissolve and liquidate, subject in the cases of clauses (ii) and
                                         (iii) to the Company’s obligations under Delaware law to provide for claims of
                                         creditors and other requirements of applicable law. The undersigned hereby waives any
                                         and all right, title, interest or claim of any kind in or to any distribution of the
                                         Trust Account and any remaining net assets of the Company as a result of such liquidation
                                         with respect to the Founder Shares owned by the undersigned. However, if any of the undersigned
                                         have acquired IPO Shares in or after the IPO, they will be entitled to liquidating distributions
                                         from the Trust Account with respect to such IPO Shares in the event that the Company
                                         fails to consummate a Business Combination within the time period set forth in the Charter.
                                         The undersigned acknowledges and agrees that there will be no distribution from the Trust
                                         Account with respect to any Warrants, all rights of which will terminate on the Company’s
                                         liquidation.

 

     

     

    

 

		3.	The
                                         undersigned acknowledges and agrees that prior to entering into a definitive agreement
                                         for a Business Combination with a target business that is affiliated with the undersigned
                                         or any other Insiders of the Company or their affiliates, such transaction must be approved
                                         by a majority of the Company’s disinterested independent directors and the Company
                                         must obtain an opinion from an independent investment banking firm, which is a member
                                         of the Financial Industry Regulatory Authority, or an independent accounting firm that
                                         such Business Combination is fair to the Company’s unaffiliated shareholders from
                                         a financial point of view.

 

		4.	None
                                         of the undersigned, any member of the family of any of the undersigned, or any affiliate
                                         of the undersigned will be entitled to receive and will not accept any compensation or
                                         other cash payment prior to, or for services rendered in order to effectuate, the consummation
                                         of the Business Combination; provided that the Company shall be allowed to make the payments
                                         set forth in the Registration Statement adjacent to the caption “Prospectus Summary—The
                                         Offering—Limited payments to insiders.”

 

		5.	In
                                         the event of the liquidation of the Trust Fund, the undersigned agrees to indemnify and
                                         hold harmless the Company against any and all loss, liability, claims, damage and expense
                                         whatsoever (including, but not limited to, any and all legal or other expenses reasonably
                                         incurred in investigating, preparing or defending against any litigation, whether pending
                                         or threatened, or any claim whatsoever) which the Company may become subject as a result
                                         of any claim by any target business or vendor or other person who is owed money by the
                                         Company for services rendered or products sold or contracted for, but only to the extent
                                         necessary to ensure that such loss, liability, claim, damage or expense does not reduce
                                         the amount of funds in the Trust Fund; provided that such indemnity shall not
                                         apply if such target business, vendor or other person has executed an agreement waiving
                                         any claims against the Trust Fund.

 

		(a)	The
                                         undersigned agrees that the Founder Shares may not be transferred, assigned or sold (except
                                         to certain permitted transferees as described in the Registration Statement or herein)
                                         (the “Lockup”) until the earlier to occur of: (1) six (6) months
                                         after the completion of a Business Combination or (2) the date following the completion
                                         of the Company’s initial Business Combination on which the Company completes a
                                         liquidation, merger, share exchange, reorganization or other similar transaction that
                                         results in all of the Company’s shareholders having the right to exchange their
                                         shares of Common Stock for cash, securities or other property. Notwithstanding the foregoing,
                                         if the closing price of the Company’s Common Stock equals or exceeds $12.50 per
                                         share (as adjusted for share splits, share capitalizations, reorganizations, recapitalizations
                                         and the like) for any 20 trading days within any 30-trading day period commencing at
                                         least 150 days after the Company’s initial Business Combination, 50% of the Founder
                                         Shares will be released from the Lockup.

 

		(b)	The
                                         undersigned will not, without the prior written consent of the Representative pursuant
                                         to the Underwriting Agreement, offer, sell, contract to sell, pledge, hedge or otherwise
                                         dispose of (or enter into any transaction that is designed to, or might reasonably be
                                         expected to, result in the disposition (whether by actual disposition or effective economic
                                         disposition due to cash settlement or otherwise) by the undersigned or any affiliate
                                         of the undersigned or any person in privity with the undersigned or any affiliate of
                                         the undersigned), directly or indirectly, including the filing (or participation in the
                                         filing) of a registration statement with the Securities and Exchange Commission in respect
                                         of, or establish or increase a put equivalent position or liquidate or decrease a call
                                         equivalent position within the meaning of Section 16 of the Securities Exchange Act of
                                         1934, as amended, and the rules and regulations of the Securities and Exchange Commission
                                         promulgated thereunder with respect to, any other Units, Common Stock or Warrants of
                                         the Company or any securities convertible into, or exercisable, or exchangeable for,
                                         shares of Common Stock or publicly announce an intention to effect any such transaction,
                                         for a period of 180 days after the date of the Underwriting Agreement.

 

		(c)	The
                                         undersigned agrees that until the Company consummates an initial Business Combination,
                                         the undersigned’s Private Placement Warrants will be subject to the transfer restrictions
                                         described in the Private Placement Warrants Purchase Agreement relating to the undersigned’s
                                         Private Placement Warrants.

 

    2

     

    

 

		(d)	Notwithstanding
                                         the provisions set forth in paragraphs 6(a) and (c), transfers, assignments and sales
                                         (a “Transfer”) by the undersigned of the Founder Shares, Private
                                         Placement Warrants and Common Stock issued or issuable upon the exercise of the Private
                                         Placement Warrants or conversion of the Founder Shares are permitted if the Transfer
                                         (i) is among the insiders, to the Company’s officers, directors, advisors or employees;
                                         (ii) is to an Insider’s affiliates or its members upon liquidation; (iii) is to
                                         relatives and trusts for estate planning purposes; (iv) is by virtue of the law of descent
                                         and distribution upon death; (v) is pursuant to a qualified domestic relations order;
                                         (vi) involves a private sale made at a price no greater than the price at which the Founder
                                         Shares, Private Placement Warrants or Common Stock were originally purchased; or (vii)
                                         is to the Company for cancellation in connection with the consummation of the Business
                                         Combination, in each case (except for clause (vii)) where the transferee agrees to the
                                         terms of the escrow agreement and forfeiture, as the case may be, as well as the other
                                         applicable restrictions and agreements of the holders of the Founder Shares.

 

		(e)	The
                                         undersigned acknowledges and agrees that if, in order to consummate any Business Combination,
                                         the holders of Founder Shares or Private Placement Warrants are required to contribute
                                         back to the capital of the Company a portion of any such securities to be cancelled by
                                         the Company or transfer any such securities to third parties, the undersigned will contribute
                                         back to the capital of the Company or transfer to such third parties, at no cost, a proportionate
                                         number of Founder Shares or Private Placement Warrants, as applicable, pro rata with
                                         the other holders of Founder Shares or Private Placement Warrants, as applicable.

 

		6.	

 

		(a)	In
                                         order to minimize potential conflicts of interest that may arise from multiple corporate
                                         affiliations, the undersigned hereby agrees that until the earliest of the Company’s
                                         initial Business Combination or liquidation, the undersigned shall present to the Company
                                         for its consideration, prior to presentation to any other entity, any target business
                                         that has a fair market value of at least 80% of the assets held in the Trust Account
                                         (excluding the amount of deferred underwriting discounts held in trust and taxes payable
                                         on the interest earned on the trust account), subject to any existing or future fiduciary
                                         or contractual obligations the undersigned might have.

 

		(b)	The
                                         undersigned hereby agrees and acknowledges that (i) the Representative and the Company
                                         would be irreparably injured in the event of a breach of the obligations under paragraph
                                         6(a) above, (ii) monetary damages may not be an adequate remedy for such breach and (iii)
                                         the non-breaching party shall be entitled to injunctive relief, in addition to any other
                                         remedy that such party may have in law or in equity, in the event of such breach.

 

		7.	The
                                         undersigned has full right and power, without violating any agreement by which he or
                                         she is bound, to enter into this Letter Agreement and to serve as a director or officer
                                         of the Company, as applicable.

 

		8.	The
                                         undersigned hereby waives his or her right to exercise redemption rights with respect
                                         to any of the Company’s Common Stock owned or to be owned by the undersigned, directly
                                         or indirectly, whether such shares be part of the Founder Shares or IPO Shares, and agrees
                                         that he or she will not seek redemption with respect to such shares (or sell such shares
                                         to the Company in any tender offer) in connection with any vote to approve a Business
                                         Combination.

 

		9.	The
                                         undersigned hereby agrees to not propose, or vote in favor of, an amendment to Article
                                         Sixth of the Charter prior to the consummation of a Business Combination unless the Company
                                         provides public shareholders with the opportunity to redeem their IPO Shares upon such
                                         approval in accordance with such Article Sixth thereof.

 

		10.	The
                                         undersigned agrees not to participate in the formation of, or become an officer or director
                                         of, any other blank check company (excluding existing affiliations), until the Company
                                         has entered into a definitive agreement with respect to an initial Business Combination
                                         or the Company has failed to complete an initial Business Combination within the time
                                         period set forth in the Charter.

 

    3

     

    

 

		11.	This
                                         Letter Agreement shall be governed by and construed and enforced in accordance with the
                                         laws of the State of New York, without giving effect to conflicts of law principles that
                                         would result in the application of the substantive laws of another jurisdiction. The
                                         undersigned hereby (i) agrees that any action, proceeding or claim against him arising
                                         out of or relating in any way to this Letter Agreement shall be brought and enforced
                                         in the courts of the State of New York of the United States of America for the Southern
                                         District of New York, and irrevocably submits to such jurisdiction, which jurisdiction
                                         shall be exclusive and (ii) waives any objection to such exclusive jurisdiction and that
                                         such courts represent an inconvenient forum.

 

		12.	As
                                         used herein, (i) a “Business Combination” shall mean a merger,
                                         share exchange, asset acquisition, stock purchase, recapitalization, reorganization or
                                         other similar business combination with one or more businesses or entities; (ii) “Insiders”
                                         shall mean all officers, directors and sponsors of the Company immediately prior to the
                                         IPO; (iii) “Founder Shares” shall mean the 2,875,000 shares
                                         of Common Stock of the Company acquired by the Sponsor prior to the IPO; (iv) “IPO
                                         Shares” shall mean the shares of Common Stock issued in the Company’s
                                         IPO; (v) “Private Placement Warrants” shall mean the warrants
                                         that are being sold privately by the Company simultaneously with the consummation of
                                         the IPO; (vi) “Trust Account” shall mean the trust account
                                         into which the net proceeds of the Company’s IPO and a portion of the proceeds
                                         from the sale of the Private Placement Warrants will be deposited; and (vii) “Registration
                                         Statement” means the Company’s registration statement on Form S-1
                                         (SEC File No. 333-230893) filed with the Securities and Exchange Commission, as amended.

 

		13.	This
                                         Letter Agreement constitutes the entire agreement and understanding of the parties hereto
                                         in respect of the subject matter hereof and supersedes all prior understandings, agreements,
                                         or representations by or among the parties hereto, written or oral, to the extent they
                                         relate in any way to the subject matter hereof or the transactions contemplated hereby.
                                         This Letter Agreement may not be changed, amended, modified or waived (other than to
                                         correct a typographical error) as to any particular provision, except by a written instrument
                                         executed by all parties hereto.

 

		14.	The
                                         undersigned acknowledges and understands that the Representative and the Company will
                                         rely upon the agreements, representations and warranties set forth herein in proceeding
                                         with the IPO. Nothing contained herein shall be deemed to render the any Representative
                                         a representative of, or a fiduciary with respect to, the Company, its shareholders or
                                         any creditor or vendor of the Company with respect to the subject matter hereof.

 

		15.	This
                                         Letter Agreement shall be binding on the undersigned and such person’s respective
                                         successors, heirs, personal representatives and assigns. This Letter Agreement shall
                                         terminate on the earlier of (i) the consummation of a Business Combination and (ii) the
                                         liquidation of the Company; provided that such termination shall not relieve the undersigned
                                         from liability for any breach of this agreement prior to its termination. The parties
                                         hereto may not assign either this Letter Agreement or any of their rights, interests,
                                         or obligations hereunder without the prior written consent of the other party. Any purported
                                         assignment in violation of this paragraph shall be void and ineffectual and shall not
                                         operate to transfer or assign any interest or title to the purported assignee.

 

[Signature
Page Follows]

 

    4

     

    

 

	 	Sincerely,
	 	 	Health
                                         Sciences Holdings, LLC
	 	 	 
	 	By:

        
	

        /s/
Roderick Wong

        

	 	 	Name: Roderick Wong,
    MD
	 	 	Title: Director

 

	 	Acknowledged
    and Agreed:
	 	Health
    Sciences Acquisitions Corporation
	 	By:	/s/
    Roderick Wong
	 	 	Name: Roderick Wong,
    MD
	 	 	Title: President

 

     

     

    

 

May 9, 2019

 

Health Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

 

Chardan Capital Markets LLC

17 State Street

New York, NY 10004

 

Re: Initial Public Offering

 

Ladies and Gentlemen:

 

This letter (the “Letter Agreement”)
is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”)
entered into by and between Health Sciences Acquisitions Corporation, a Delaware corporation (the “Company”)
and Chardan Capital Markets LLC (the “Representative”), relating to an underwritten initial public offering
(the “IPO”) of the Company’s units (the “Units”), each Unit comprised
of one share of common stock of the Company, par value $0.0001 per share (the “Common Stock”), and one
redeemable warrant, each whole warrant exercisable for one-half of one share of Common Stock (each, a “Warrant”).
Certain capitalized terms used herein are defined in paragraph 12 hereof.

 

In order to induce the Company and the
Representative to enter into the Underwriting Agreement and to proceed with the IPO, and in recognition of the benefit that such
IPO will confer upon the undersigned, and for other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the undersigned hereby agrees with the Company as follows:

 

		1.	If the Company solicits approval of its shareholders of a Business Combination, the undersigned
will vote all shares beneficially owned by him or her, whether acquired before, in or after the IPO, in favor of such Business
Combination.

 

		2.	In the event that the Company fails to consummate a Business Combination within the time period
set forth in the Company’s amended and restated certificate of incorporation, as the same may be further amended from time
to time (the “Charter”), the undersigned will, as promptly as possible, take all necessary actions to
cause the Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible, but
not more than 10 business days thereafter, redeem the IPO Shares, at a per-share price, payable in cash, equal to the aggregate
amount then on deposit in the Trust Account, including interest earned on the Trust Account not previously released to the Company
(less taxes payable), divided by the number of then outstanding IPO Shares, which redemption will completely extinguish public
shareholders’ rights as shareholders (including the right to receive further liquidation distributions, if any), and (iii)
as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining shareholders
and the Company’s board of directors, dissolve and liquidate, subject in the cases of clauses (ii) and (iii) to the Company’s
obligations under Delaware law to provide for claims of creditors and other requirements of applicable law. The undersigned hereby
waives any and all right, title, interest or claim of any kind in or to any distribution of the Trust Account and any remaining
net assets of the Company as a result of such liquidation with respect to the Founder Shares owned by the undersigned. However,
if any of the undersigned have acquired IPO Shares in or after the IPO, they will be entitled to liquidating distributions from
the Trust Account with respect to such IPO Shares in the event that the Company fails to consummate a Business Combination within
the time period set forth in the Charter. The undersigned acknowledges and agrees that there will be no distribution from the Trust
Account with respect to any Warrants, all rights of which will terminate on the Company’s liquidation.

 

     

     

    

 

		3.	The undersigned acknowledges and agrees that prior to entering into a definitive agreement for
a Business Combination with a target business that is affiliated with the undersigned or any other Insiders of the Company or their
affiliates, such transaction must be approved by a majority of the Company’s disinterested independent directors and the
Company must obtain an opinion from an independent investment banking firm, which is a member of the Financial Industry Regulatory
Authority, or an independent accounting firm that such Business Combination is fair to the Company’s unaffiliated shareholders
from a financial point of view.

 

		4.	None of the undersigned, any member of the family of any of the undersigned, or any affiliate of
the undersigned will be entitled to receive and will not accept any compensation or other cash payment prior to, or for services
rendered in order to effectuate, the consummation of the Business Combination; provided that the Company shall be allowed to make
the payments set forth in the Registration Statement adjacent to the caption “Prospectus Summary—The Offering—Limited
payments to insiders.”

 

		5.	

 

		(a)	In order to minimize potential conflicts of interest that may arise from multiple corporate affiliations,
the undersigned hereby agrees that until the earliest of the Company’s initial Business Combination or liquidation, the undersigned
shall present to the Company for its consideration, prior to presentation to any other entity, any target business that has a fair
market value of at least 80% of the assets held in the Trust Account (excluding the amount of deferred underwriting discounts held
in trust and taxes payable on the interest earned on the trust account), subject to any existing or future fiduciary or contractual
obligations the undersigned might have.

 

		(b)	The undersigned hereby agrees and acknowledges that (i) the Representative and the Company would
be irreparably injured in the event of a breach of the obligations under paragraph 6(a) above, (ii) monetary damages may not be
an adequate remedy for such breach and (iii) the non-breaching party shall be entitled to injunctive relief, in addition to any
other remedy that such party may have in law or in equity, in the event of such breach.

 

		6.	The undersigned agrees to be a director or officer of the Company, as applicable, until the earlier
of the consummation by the Company of an initial Business Combination or the liquidation of the Company. The undersigned’s
biographical information previously furnished to the Company and the Representative is true and accurate in all material respects,
does not omit any material information with respect to the undersigned’s background and contains all of the information required
to be disclosed pursuant to Item 401 of Regulation S-K, promulgated under the Securities Act of 1933, as amended. The undersigned’s
FINRA Questionnaire previously furnished to the Company and the Representative is true and accurate in all material respects. The
undersigned represents and warrants that:

 

		(a)	He or she is not subject to, or a respondent in, any legal action for, any injunction, cease-and-desist
order or order or stipulation to desist or refrain from any act or practice relating to the offering of securities in any jurisdiction;

 

		(b)	He or she has never been convicted of or pleaded guilty to any crime (i) involving any fraud or
(ii) relating to any financial transaction or handling of funds of another person, or (iii) pertaining to any dealings in any securities
and he is not currently a defendant in any such criminal proceeding; and

 

		(c)	he or she has never been suspended or expelled from membership in any securities or commodities
exchange or association or had a securities or commodities license or registration denied, suspended or revoked.

 

		7.	The undersigned has full right and power, without violating any agreement by which he or she is
bound, to enter into this Letter Agreement and to serve as a director or officer of the Company, as applicable.

 

		8.	The undersigned hereby waives his or her right to exercise redemption rights with respect to any
of the Company’s Common Stock owned or to be owned by the undersigned, directly or indirectly, whether such shares be part
of the Founder Shares or IPO Shares, and agrees that he or she will not seek redemption with respect to such shares (or sell such
shares to the Company in any tender offer) in connection with any vote to approve a Business Combination.

 

    2

     

    

 

		9.	The undersigned hereby agrees to not propose, or vote in favor of, an amendment to Article 6 of
the Charter prior to the consummation of a Business Combination unless the Company provides public shareholders with the opportunity
to redeem their IPO Shares upon such approval in accordance with such Article 6 thereof.

 

		10.	The undersigned agrees not to participate in the formation of, or become an officer or director
of, any other blank check company (excluding existing affiliations), until the Company has entered into a definitive agreement
with respect to an initial Business Combination or the Company has failed to complete an initial Business Combination within the
time period set forth in the Charter.

 

		11.	This Letter Agreement shall be governed by and construed and enforced in accordance with the laws
of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive
laws of another jurisdiction. The undersigned hereby (i) agrees that any action, proceeding or claim against him arising out of
or relating in any way to this Letter Agreement shall be brought and enforced in the courts of the State of New York of the United
States of America for the Southern District of New York, and irrevocably submits to such jurisdiction, which jurisdiction shall
be exclusive and (ii) waives any objection to such exclusive jurisdiction and that such courts represent an inconvenient forum.

 

		12.	As used herein, (i) a “Business Combination” shall mean a merger, share
exchange, asset acquisition, stock purchase, recapitalization, reorganization or other similar business combination with one or
more businesses or entities; (ii) “Insiders” shall mean all officers, directors and sponsors of the Company
immediately prior to the IPO; (iii) “Founder Shares” shall mean the 2,875,000 shares of Common Stock
of the Company acquired by the Sponsor prior to the IPO; (iv) “IPO Shares” shall mean the shares of Common
Stock issued in the Company’s IPO; (v) “Private Placement Warrants” shall mean the warrants that
are being sold privately by the Company simultaneously with the consummation of the IPO; (vi) “Trust Account”
shall mean the trust account into which the net proceeds of the Company’s IPO and a portion of the proceeds from the sale
of the Private Placement Warrants will be deposited; and (vii) “Registration Statement” means the Company’s
registration statement on Form S-1 (SEC File No. 333-230893) filed with the Securities and Exchange Commission, as amended.

 

		13.	This Letter Agreement constitutes the entire agreement and understanding of the parties hereto
in respect of the subject matter hereof and supersedes all prior understandings, agreements, or representations by or among the
parties hereto, written or oral, to the extent they relate in any way to the subject matter hereof or the transactions contemplated
hereby. This Letter Agreement may not be changed, amended, modified or waived (other than to correct a typographical error) as
to any particular provision, except by a written instrument executed by all parties hereto.

 

		14.	The undersigned acknowledges and understands that the Representative and the Company will rely
upon the agreements, representations and warranties set forth herein in proceeding with the IPO. Nothing contained herein shall
be deemed to render the any Representative a representative of, or a fiduciary with respect to, the Company, its shareholders or
any creditor or vendor of the Company with respect to the subject matter hereof.

 

		15.	This Letter Agreement shall be binding on the undersigned and such person’s respective successors,
heirs, personal representatives and assigns. This Letter Agreement shall terminate on the earlier of (i) the consummation of a
Business Combination and (ii) the liquidation of the Company; provided that such termination shall not relieve the undersigned
from liability for any breach of this agreement prior to its termination. The parties hereto may not assign either this Letter
Agreement or any of their rights, interests, or obligations hereunder without the prior written consent of the other party. Any
purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any
interest or title to the purported assignee.

 

    3

     

    

 

[Signature Page Follows]

 

    4

     

    

 

	 	Sincerely,
	 	By:	/s/ Mark Schoenebaum
	 	 	Name of Insider: Mark Schoenebaum,

                                MD

 

	 	Acknowledged and Agreed:
	 	Health Sciences Acquisitions Corporation
	 	By:	/s/ Roderick Wong
	 	 	Name: Roderick Wong, MD
	 	 	Title: President

 

     

     

    

 

May 9, 2019

 

Health Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

 

Chardan Capital Markets LLC

17 State Street

New York, NY 10004

 

Re: Initial Public Offering

 

Ladies and Gentlemen:

 

This letter (the “Letter Agreement”)
is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”)
entered into by and between Health Sciences Acquisitions Corporation, a Delaware corporation (the “Company”)
and Chardan Capital Markets LLC (the “Representative”), relating to an underwritten initial public offering
(the “IPO”) of the Company’s units (the “Units”), each Unit comprised
of one share of common stock of the Company, par value $0.0001 per share (the “Common Stock”), and one
redeemable warrant, each whole warrant exercisable for one-half of one share of Common Stock (each, a “Warrant”).
Certain capitalized terms used herein are defined in paragraph 12 hereof.

 

In order to induce the Company and the
Representative to enter into the Underwriting Agreement and to proceed with the IPO, and in recognition of the benefit that such
IPO will confer upon the undersigned, and for other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the undersigned hereby agrees with the Company as follows:

 

		1.	If the Company solicits approval of its shareholders of a Business Combination, the undersigned
will vote all shares beneficially owned by him or her, whether acquired before, in or after the IPO, in favor of such Business
Combination.

 

		2.	In the event that the Company fails to consummate a Business Combination within the time period
set forth in the Company’s amended and restated certificate of incorporation, as the same may be further amended from time
to time (the “Charter”), the undersigned will, as promptly as possible, take all necessary actions to
cause the Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible, but
not more than 10 business days thereafter, redeem the IPO Shares, at a per-share price, payable in cash, equal to the aggregate
amount then on deposit in the Trust Account, including interest earned on the Trust Account not previously released to the Company
(less taxes payable), divided by the number of then outstanding IPO Shares, which redemption will completely extinguish public
shareholders’ rights as shareholders (including the right to receive further liquidation distributions, if any), and (iii)
as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining shareholders
and the Company’s board of directors, dissolve and liquidate, subject in the cases of clauses (ii) and (iii) to the Company’s
obligations under Delaware law to provide for claims of creditors and other requirements of applicable law. The undersigned hereby
waives any and all right, title, interest or claim of any kind in or to any distribution of the Trust Account and any remaining
net assets of the Company as a result of such liquidation with respect to the Founder Shares owned by the undersigned. However,
if any of the undersigned have acquired IPO Shares in or after the IPO, they will be entitled to liquidating distributions from
the Trust Account with respect to such IPO Shares in the event that the Company fails to consummate a Business Combination within
the time period set forth in the Charter. The undersigned acknowledges and agrees that there will be no distribution from the Trust
Account with respect to any Warrants, all rights of which will terminate on the Company’s liquidation.

 

     

     

    

 

		3.	The undersigned acknowledges and agrees that prior to entering into a definitive agreement for
a Business Combination with a target business that is affiliated with the undersigned or any other Insiders of the Company or their
affiliates, such transaction must be approved by a majority of the Company’s disinterested independent directors and the
Company must obtain an opinion from an independent investment banking firm, which is a member of the Financial Industry Regulatory
Authority, or an independent accounting firm that such Business Combination is fair to the Company’s unaffiliated shareholders
from a financial point of view.

 

		4.	None of the undersigned, any member of the family of any of the undersigned, or any affiliate of
the undersigned will be entitled to receive and will not accept any compensation or other cash payment prior to, or for services
rendered in order to effectuate, the consummation of the Business Combination; provided that the Company shall be allowed to make
the payments set forth in the Registration Statement adjacent to the caption “Prospectus Summary—The Offering—Limited
payments to insiders.”

 

		5.	

 

		(a)	In order to minimize potential conflicts of interest that may arise from multiple corporate affiliations,
the undersigned hereby agrees that until the earliest of the Company’s initial Business Combination or liquidation, the undersigned
shall present to the Company for its consideration, prior to presentation to any other entity, any target business that has a fair
market value of at least 80% of the assets held in the Trust Account (excluding the amount of deferred underwriting discounts held
in trust and taxes payable on the interest earned on the trust account), subject to any existing or future fiduciary or contractual
obligations the undersigned might have.

 

		(b)	The undersigned hereby agrees and acknowledges that (i) the Representative and the Company would
be irreparably injured in the event of a breach of the obligations under paragraph 6(a) above, (ii) monetary damages may not be
an adequate remedy for such breach and (iii) the non-breaching party shall be entitled to injunctive relief, in addition to any
other remedy that such party may have in law or in equity, in the event of such breach.

 

		6.	The undersigned agrees to be a director or officer of the Company, as applicable, until the earlier
of the consummation by the Company of an initial Business Combination or the liquidation of the Company. The undersigned’s
biographical information previously furnished to the Company and the Representative is true and accurate in all material respects,
does not omit any material information with respect to the undersigned’s background and contains all of the information required
to be disclosed pursuant to Item 401 of Regulation S-K, promulgated under the Securities Act of 1933, as amended. The undersigned’s
FINRA Questionnaire previously furnished to the Company and the Representative is true and accurate in all material respects. The
undersigned represents and warrants that:

 

		(a)	He or she is not subject to, or a respondent in, any legal action for, any injunction, cease-and-desist
order or order or stipulation to desist or refrain from any act or practice relating to the offering of securities in any jurisdiction;

 

		(b)	He or she has never been convicted of or pleaded guilty to any crime (i) involving any fraud or
(ii) relating to any financial transaction or handling of funds of another person, or (iii) pertaining to any dealings in any securities
and he is not currently a defendant in any such criminal proceeding; and

 

		(c)	he or she has never been suspended or expelled from membership in any securities or commodities
exchange or association or had a securities or commodities license or registration denied, suspended or revoked.

 

		7.	The undersigned has full right and power, without violating any agreement by which he or she is
bound, to enter into this Letter Agreement and to serve as a director or officer of the Company, as applicable.

 

		8.	The undersigned hereby waives his or her right to exercise redemption rights with respect to any
of the Company’s Common Stock owned or to be owned by the undersigned, directly or indirectly, whether such shares be part
of the Founder Shares or IPO Shares, and agrees that he or she will not seek redemption with respect to such shares (or sell such
shares to the Company in any tender offer) in connection with any vote to approve a Business Combination.

 

    2 

     

    

 

		9.	The undersigned hereby agrees to not propose, or vote in favor of, an amendment to Article 6 of
the Charter prior to the consummation of a Business Combination unless the Company provides public shareholders with the opportunity
to redeem their IPO Shares upon such approval in accordance with such Article 6 thereof.

 

		10.	The undersigned agrees not to participate in the formation of, or become an officer or director
of, any other blank check company (excluding existing affiliations), until the Company has entered into a definitive agreement
with respect to an initial Business Combination or the Company has failed to complete an initial Business Combination within the
time period set forth in the Charter.

 

		11.	This Letter Agreement shall be governed by and construed and enforced in accordance with the laws
of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive
laws of another jurisdiction. The undersigned hereby (i) agrees that any action, proceeding or claim against him arising out of
or relating in any way to this Letter Agreement shall be brought and enforced in the courts of the State of New York of the United
States of America for the Southern District of New York, and irrevocably submits to such jurisdiction, which jurisdiction shall
be exclusive and (ii) waives any objection to such exclusive jurisdiction and that such courts represent an inconvenient forum.

 

		12.	As used herein, (i) a “Business Combination” shall mean a merger, share
exchange, asset acquisition, stock purchase, recapitalization, reorganization or other similar business combination with one or
more businesses or entities; (ii) “Insiders” shall mean all officers, directors and sponsors of the Company
immediately prior to the IPO; (iii) “Founder Shares” shall mean the 2,875,000 shares of Common Stock
of the Company acquired by the Sponsor prior to the IPO; (iv) “IPO Shares” shall mean the shares of Common
Stock issued in the Company’s IPO; (v) “Private Placement Warrants” shall mean the warrants that
are being sold privately by the Company simultaneously with the consummation of the IPO; (vi) “Trust Account”
shall mean the trust account into which the net proceeds of the Company’s IPO and a portion of the proceeds from the sale
of the Private Placement Warrants will be deposited; and (vii) “Registration Statement” means the Company’s
registration statement on Form S-1 (SEC File No. 333-230893) filed with the Securities and Exchange Commission, as amended.

 

		13.	This Letter Agreement constitutes the entire agreement and understanding of the parties hereto
in respect of the subject matter hereof and supersedes all prior understandings, agreements, or representations by or among the
parties hereto, written or oral, to the extent they relate in any way to the subject matter hereof or the transactions contemplated
hereby. This Letter Agreement may not be changed, amended, modified or waived (other than to correct a typographical error) as
to any particular provision, except by a written instrument executed by all parties hereto.

 

		14.	The undersigned acknowledges and understands that the Representative and the Company will rely
upon the agreements, representations and warranties set forth herein in proceeding with the IPO. Nothing contained herein shall
be deemed to render the any Representative a representative of, or a fiduciary with respect to, the Company, its shareholders or
any creditor or vendor of the Company with respect to the subject matter hereof.

 

		15.	This Letter Agreement shall be binding on the undersigned and such person’s respective successors,
heirs, personal representatives and assigns. This Letter Agreement shall terminate on the earlier of (i) the consummation of a
Business Combination and (ii) the liquidation of the Company; provided that such termination shall not relieve the undersigned
from liability for any breach of this agreement prior to its termination. The parties hereto may not assign either this Letter
Agreement or any of their rights, interests, or obligations hereunder without the prior written consent of the other party. Any
purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any
interest or title to the purported assignee.

 

    3 

     

    

 

[Signature Page Follows]

 

    4 

     

    

 

	 	Sincerely,
	 	By:	/s/ Naveen Yalamanchi
	 	 	Name of Insider: Naveen Yalamanchi,

                                MD

 

	 	Acknowledged and Agreed:
	 	Health Sciences Acquisitions Corporation
	 	By:	/s/ Roderick Wong
	 	 	Name: Roderick Wong, MD
	 	 	Title: President

 

    

     

    

 

May
9, 2019

 

Health
Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

 

Chardan
Capital Markets LLC

17 State Street

New York, NY 10004

 

Re:
Initial Public Offering

 

Ladies
and Gentlemen:

 

This
letter (the “Letter Agreement”) is being delivered to you in accordance with the Underwriting Agreement
(the “Underwriting Agreement”) entered into by and between Health Sciences Acquisitions Corporation,
a Delaware corporation (the “Company”) and Chardan Capital Markets LLC (the “Representative”),
relating to an underwritten initial public offering (the “IPO”) of the Company’s units (the “Units”),
each Unit comprised of one share of common stock of the Company, par value $0.0001 per share (the “Common Stock”),
and one redeemable warrant, each whole warrant exercisable for one-half of one share of Common Stock (each, a “Warrant”).
Certain capitalized terms used herein are defined in paragraph 12 hereof.

 

In
order to induce the Company and the Representative to enter into the Underwriting Agreement and to proceed with the IPO, and in
recognition of the benefit that such IPO will confer upon the undersigned, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the undersigned hereby agrees with the Company as follows:

 

		1.	If
                                         the Company solicits approval of its shareholders of a Business Combination, the undersigned
                                         will vote all shares beneficially owned by him or her, whether acquired before, in or
                                         after the IPO, in favor of such Business Combination.

 

		2.	In
                                         the event that the Company fails to consummate a Business Combination within the time
                                         period set forth in the Company’s amended and restated certificate of incorporation,
                                         as the same may be further amended from time to time (the “Charter”),
                                         the undersigned will, as promptly as possible, take all necessary actions to cause the
                                         Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly
                                         as reasonably possible, but not more than 10 business days thereafter, redeem the IPO
                                         Shares, at a per-share price, payable in cash, equal to the aggregate amount then on
                                         deposit in the Trust Account, including interest earned on the Trust Account not previously
                                         released to the Company (less taxes payable), divided by the number of then outstanding
                                         IPO Shares, which redemption will completely extinguish public shareholders’ rights
                                         as shareholders (including the right to receive further liquidation distributions, if
                                         any), and (iii) as promptly as reasonably possible following such redemption, subject
                                         to the approval of the Company’s remaining shareholders and the Company’s
                                         board of directors, dissolve and liquidate, subject in the cases of clauses (ii) and
                                         (iii) to the Company’s obligations under Delaware law to provide for claims of
                                         creditors and other requirements of applicable law. The undersigned hereby waives any
                                         and all right, title, interest or claim of any kind in or to any distribution of the
                                         Trust Account and any remaining net assets of the Company as a result of such liquidation
                                         with respect to the Founder Shares owned by the undersigned. However, if any of the undersigned
                                         have acquired IPO Shares in or after the IPO, they will be entitled to liquidating distributions
                                         from the Trust Account with respect to such IPO Shares in the event that the Company
                                         fails to consummate a Business Combination within the time period set forth in the Charter.
                                         The undersigned acknowledges and agrees that there will be no distribution from the Trust
                                         Account with respect to any Warrants, all rights of which will terminate on the Company’s
                                         liquidation.

 

    

     

    

 

		3.	The
                                         undersigned acknowledges and agrees that prior to entering into a definitive agreement
                                         for a Business Combination with a target business that is affiliated with the undersigned
                                         or any other Insiders of the Company or their affiliates, such transaction must be approved
                                         by a majority of the Company’s disinterested independent directors and the Company
                                         must obtain an opinion from an independent investment banking firm, which is a member
                                         of the Financial Industry Regulatory Authority, or an independent accounting firm that
                                         such Business Combination is fair to the Company’s unaffiliated shareholders from
                                         a financial point of view.

 

		4.	None
                                         of the undersigned, any member of the family of any of the undersigned, or any affiliate
                                         of the undersigned will be entitled to receive and will not accept any compensation or
                                         other cash payment prior to, or for services rendered in order to effectuate, the consummation
                                         of the Business Combination; provided that the Company shall be allowed to make the payments
                                         set forth in the Registration Statement adjacent to the caption “Prospectus Summary—The
                                         Offering—Limited payments to insiders.”

 

		5.	

 

		(a)	In
                                         order to minimize potential conflicts of interest that may arise from multiple corporate
                                         affiliations, the undersigned hereby agrees that until the earliest of the Company’s
                                         initial Business Combination or liquidation, the undersigned shall present to the Company
                                         for its consideration, prior to presentation to any other entity, any target business
                                         that has a fair market value of at least 80% of the assets held in the Trust Account
                                         (excluding the amount of deferred underwriting discounts held in trust and taxes payable
                                         on the interest earned on the trust account), subject to any existing or future fiduciary
                                         or contractual obligations the undersigned might have.

 

		(b)	The
                                         undersigned hereby agrees and acknowledges that (i) the Representative and the Company
                                         would be irreparably injured in the event of a breach of the obligations under paragraph
                                         6(a) above, (ii) monetary damages may not be an adequate remedy for such breach and (iii)
                                         the non-breaching party shall be entitled to injunctive relief, in addition to any other
                                         remedy that such party may have in law or in equity, in the event of such breach.

 

		6.	The
                                         undersigned agrees to be a director or officer of the Company, as applicable, until the
                                         earlier of the consummation by the Company of an initial Business Combination or the
                                         liquidation of the Company. The undersigned’s biographical information previously
                                         furnished to the Company and the Representative is true and accurate in all material
                                         respects, does not omit any material information with respect to the undersigned’s
                                         background and contains all of the information required to be disclosed pursuant to Item
                                         401 of Regulation S-K, promulgated under the Securities Act of 1933, as amended. The
                                         undersigned’s FINRA Questionnaire previously furnished to the Company and the Representative
                                         is true and accurate in all material respects. The undersigned represents and warrants
                                         that:

 

		(a)	He
                                         or she is not subject to, or a respondent in, any legal action for, any injunction, cease-and-desist
                                         order or order or stipulation to desist or refrain from any act or practice relating
                                         to the offering of securities in any jurisdiction;

 

		(b)	He
                                         or she has never been convicted of or pleaded guilty to any crime (i) involving any fraud
                                         or (ii) relating to any financial transaction or handling of funds of another person,
                                         or (iii) pertaining to any dealings in any securities and he is not currently a defendant
                                         in any such criminal proceeding; and

 

		(c)	he
                                         or she has never been suspended or expelled from membership in any securities or commodities
                                         exchange or association or had a securities or commodities license or registration denied,
                                         suspended or revoked.

 

		7.	The
                                         undersigned has full right and power, without violating any agreement by which he or
                                         she is bound, to enter into this Letter Agreement and to serve as a director or officer
                                         of the Company, as applicable.

 

		8.	The
                                         undersigned hereby waives his or her right to exercise redemption rights with respect
                                         to any of the Company’s Common Stock owned or to be owned by the undersigned, directly
                                         or indirectly, whether such shares be part of the Founder Shares or IPO Shares, and agrees
                                         that he or she will not seek redemption with respect to such shares (or sell such shares
                                         to the Company in any tender offer) in connection with any vote to approve a Business
                                         Combination.

 

    2

     

    

 

		9.	The
                                         undersigned hereby agrees to not propose, or vote in favor of, an amendment to Article
                                         6 of the Charter prior to the consummation of a Business Combination unless the Company
                                         provides public shareholders with the opportunity to redeem their IPO Shares upon such
                                         approval in accordance with such Article 6 thereof.

 

		10.	The
                                         undersigned agrees not to participate in the formation of, or become an officer or director
                                         of, any other blank check company (excluding existing affiliations), until the Company
                                         has entered into a definitive agreement with respect to an initial Business Combination
                                         or the Company has failed to complete an initial Business Combination within the time
                                         period set forth in the Charter.

 

		11.	This
                                         Letter Agreement shall be governed by and construed and enforced in accordance with the
                                         laws of the State of New York, without giving effect to conflicts of law principles that
                                         would result in the application of the substantive laws of another jurisdiction. The
                                         undersigned hereby (i) agrees that any action, proceeding or claim against him arising
                                         out of or relating in any way to this Letter Agreement shall be brought and enforced
                                         in the courts of the State of New York of the United States of America for the Southern
                                         District of New York, and irrevocably submits to such jurisdiction, which jurisdiction
                                         shall be exclusive and (ii) waives any objection to such exclusive jurisdiction and that
                                         such courts represent an inconvenient forum.

 

		12.	As
                                         used herein, (i) a “Business Combination” shall mean a merger,
                                         share exchange, asset acquisition, stock purchase, recapitalization, reorganization or
                                         other similar business combination with one or more businesses or entities; (ii) “Insiders”
                                         shall mean all officers, directors and sponsors of the Company immediately prior to the
                                         IPO; (iii) “Founder Shares” shall mean the 2,875,000 shares
                                         of Common Stock of the Company acquired by the Sponsor prior to the IPO; (iv) “IPO
                                         Shares” shall mean the shares of Common Stock issued in the Company’s
                                         IPO; (v) “Private Placement Warrants” shall mean the warrants
                                         that are being sold privately by the Company simultaneously with the consummation of
                                         the IPO; (vi) “Trust Account” shall mean the trust account
                                         into which the net proceeds of the Company’s IPO and a portion of the proceeds
                                         from the sale of the Private Placement Warrants will be deposited; and (vii) “Registration
                                         Statement” means the Company’s registration statement on Form S-1
                                         (SEC File No. 333-230893) filed with the Securities and Exchange Commission, as amended.

 

		13.	This
                                         Letter Agreement constitutes the entire agreement and understanding of the parties hereto
                                         in respect of the subject matter hereof and supersedes all prior understandings, agreements,
                                         or representations by or among the parties hereto, written or oral, to the extent they
                                         relate in any way to the subject matter hereof or the transactions contemplated hereby.
                                         This Letter Agreement may not be changed, amended, modified or waived (other than to
                                         correct a typographical error) as to any particular provision, except by a written instrument
                                         executed by all parties hereto.

 

		14.	The
                                         undersigned acknowledges and understands that the Representative and the Company will
                                         rely upon the agreements, representations and warranties set forth herein in proceeding
                                         with the IPO. Nothing contained herein shall be deemed to render the any Representative
                                         a representative of, or a fiduciary with respect to, the Company, its shareholders or
                                         any creditor or vendor of the Company with respect to the subject matter hereof.

 

		15.	This
                                         Letter Agreement shall be binding on the undersigned and such person’s respective
                                         successors, heirs, personal representatives and assigns. This Letter Agreement shall
                                         terminate on the earlier of (i) the consummation of a Business Combination and (ii) the
                                         liquidation of the Company; provided that such termination shall not relieve the undersigned
                                         from liability for any breach of this agreement prior to its termination. The parties
                                         hereto may not assign either this Letter Agreement or any of their rights, interests,
                                         or obligations hereunder without the prior written consent of the other party. Any purported
                                         assignment in violation of this paragraph shall be void and ineffectual and shall not
                                         operate to transfer or assign any interest or title to the purported assignee.

 

    3

     

    

 

[Signature
Page Follows]

 

    4

     

    

 

	 	Sincerely,
	 	By:	/s/
    Pedro Granadillo
	 	 	Name of Insider: Pedro
    Granadillo

 

	 	Acknowledged
    and Agreed:
	 	Health
    Sciences Acquisitions Corporation
	 	By:	/s/
    Roderick Wong
	 	 	Name: Roderick Wong,
    MD
	 	 	Title: President

 

    

     

    

 

May
9, 2019

 

Health
Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

 

Chardan
Capital Markets LLC

17 State Street

New York, NY 10004

 

Re:
Initial Public Offering

 

Ladies
and Gentlemen:

 

This
letter (the “Letter Agreement”) is being delivered to you in accordance with the Underwriting Agreement
(the “Underwriting Agreement”) entered into by and between Health Sciences Acquisitions Corporation,
a Delaware corporation (the “Company”) and Chardan Capital Markets LLC (the “Representative”),
relating to an underwritten initial public offering (the “IPO”) of the Company’s units (the “Units”),
each Unit comprised of one share of common stock of the Company, par value $0.0001 per share (the “Common Stock”),
and one redeemable warrant, each whole warrant exercisable for one-half of one share of Common Stock (each, a “Warrant”).
Certain capitalized terms used herein are defined in paragraph 12 hereof.

 

In
order to induce the Company and the Representative to enter into the Underwriting Agreement and to proceed with the IPO, and in
recognition of the benefit that such IPO will confer upon the undersigned, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the undersigned hereby agrees with the Company as follows:

 

		1.	If
                                         the Company solicits approval of its shareholders of a Business Combination, the undersigned
                                         will vote all shares beneficially owned by him or her, whether acquired before, in or
                                         after the IPO, in favor of such Business Combination.

 

		2.	In
                                         the event that the Company fails to consummate a Business Combination within the time
                                         period set forth in the Company’s amended and restated certificate of incorporation,
                                         as the same may be further amended from time to time (the “Charter”),
                                         the undersigned will, as promptly as possible, take all necessary actions to cause the
                                         Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly
                                         as reasonably possible, but not more than 10 business days thereafter, redeem the IPO
                                         Shares, at a per-share price, payable in cash, equal to the aggregate amount then on
                                         deposit in the Trust Account, including interest earned on the Trust Account not previously
                                         released to the Company (less taxes payable), divided by the number of then outstanding
                                         IPO Shares, which redemption will completely extinguish public shareholders’ rights
                                         as shareholders (including the right to receive further liquidation distributions, if
                                         any), and (iii) as promptly as reasonably possible following such redemption, subject
                                         to the approval of the Company’s remaining shareholders and the Company’s
                                         board of directors, dissolve and liquidate, subject in the cases of clauses (ii) and
                                         (iii) to the Company’s obligations under Delaware law to provide for claims of
                                         creditors and other requirements of applicable law. The undersigned hereby waives any
                                         and all right, title, interest or claim of any kind in or to any distribution of the
                                         Trust Account and any remaining net assets of the Company as a result of such liquidation
                                         with respect to the Founder Shares owned by the undersigned. However, if any of the undersigned
                                         have acquired IPO Shares in or after the IPO, they will be entitled to liquidating distributions
                                         from the Trust Account with respect to such IPO Shares in the event that the Company
                                         fails to consummate a Business Combination within the time period set forth in the Charter.
                                         The undersigned acknowledges and agrees that there will be no distribution from the Trust
                                         Account with respect to any Warrants, all rights of which will terminate on the Company’s
                                         liquidation.

 

    

     

    

 

		3.	The
                                         undersigned acknowledges and agrees that prior to entering into a definitive agreement
                                         for a Business Combination with a target business that is affiliated with the undersigned
                                         or any other Insiders of the Company or their affiliates, such transaction must be approved
                                         by a majority of the Company’s disinterested independent directors and the Company
                                         must obtain an opinion from an independent investment banking firm, which is a member
                                         of the Financial Industry Regulatory Authority, or an independent accounting firm that
                                         such Business Combination is fair to the Company’s unaffiliated shareholders from
                                         a financial point of view.

 

		4.	None
                                         of the undersigned, any member of the family of any of the undersigned, or any affiliate
                                         of the undersigned will be entitled to receive and will not accept any compensation or
                                         other cash payment prior to, or for services rendered in order to effectuate, the consummation
                                         of the Business Combination; provided that the Company shall be allowed to make the payments
                                         set forth in the Registration Statement adjacent to the caption “Prospectus Summary—The
                                         Offering—Limited payments to insiders.”

 

		5.	

 

		(a)	In
                                         order to minimize potential conflicts of interest that may arise from multiple corporate
                                         affiliations, the undersigned hereby agrees that until the earliest of the Company’s
                                         initial Business Combination or liquidation, the undersigned shall present to the Company
                                         for its consideration, prior to presentation to any other entity, any target business
                                         that has a fair market value of at least 80% of the assets held in the Trust Account
                                         (excluding the amount of deferred underwriting discounts held in trust and taxes payable
                                         on the interest earned on the trust account), subject to any existing or future fiduciary
                                         or contractual obligations the undersigned might have.

 

		(b)	The
                                         undersigned hereby agrees and acknowledges that (i) the Representative and the Company
                                         would be irreparably injured in the event of a breach of the obligations under paragraph
                                         6(a) above, (ii) monetary damages may not be an adequate remedy for such breach and (iii)
                                         the non-breaching party shall be entitled to injunctive relief, in addition to any other
                                         remedy that such party may have in law or in equity, in the event of such breach.

 

		6.	The
                                         undersigned agrees to be a director or officer of the Company, as applicable, until the
                                         earlier of the consummation by the Company of an initial Business Combination or the
                                         liquidation of the Company. The undersigned’s biographical information previously
                                         furnished to the Company and the Representative is true and accurate in all material
                                         respects, does not omit any material information with respect to the undersigned’s
                                         background and contains all of the information required to be disclosed pursuant to Item
                                         401 of Regulation S-K, promulgated under the Securities Act of 1933, as amended. The
                                         undersigned’s FINRA Questionnaire previously furnished to the Company and the Representative
                                         is true and accurate in all material respects. The undersigned represents and warrants
                                         that:

 

		(a)	He
                                         or she is not subject to, or a respondent in, any legal action for, any injunction, cease-and-desist
                                         order or order or stipulation to desist or refrain from any act or practice relating
                                         to the offering of securities in any jurisdiction;

 

		(b)	He
                                         or she has never been convicted of or pleaded guilty to any crime (i) involving any fraud
                                         or (ii) relating to any financial transaction or handling of funds of another person,
                                         or (iii) pertaining to any dealings in any securities and he is not currently a defendant
                                         in any such criminal proceeding; and

 

		(c)	he
                                         or she has never been suspended or expelled from membership in any securities or commodities
                                         exchange or association or had a securities or commodities license or registration denied,
                                         suspended or revoked.

 

		7.	The
                                         undersigned has full right and power, without violating any agreement by which he or
                                         she is bound, to enter into this Letter Agreement and to serve as a director or officer
                                         of the Company, as applicable.

 

		8.	The
                                         undersigned hereby waives his or her right to exercise redemption rights with respect
                                         to any of the Company’s Common Stock owned or to be owned by the undersigned, directly
                                         or indirectly, whether such shares be part of the Founder Shares or IPO Shares, and agrees
                                         that he or she will not seek redemption with respect to such shares (or sell such shares
                                         to the Company in any tender offer) in connection with any vote to approve a Business
                                         Combination.

 

    2

     

    

 

		9.	The
                                         undersigned hereby agrees to not propose, or vote in favor of, an amendment to Article
                                         6 of the Charter prior to the consummation of a Business Combination unless the Company
                                         provides public shareholders with the opportunity to redeem their IPO Shares upon such
                                         approval in accordance with such Article 6 thereof.

 

		10.	The
                                         undersigned agrees not to participate in the formation of, or become an officer or director
                                         of, any other blank check company (excluding existing affiliations), until the Company
                                         has entered into a definitive agreement with respect to an initial Business Combination
                                         or the Company has failed to complete an initial Business Combination within the time
                                         period set forth in the Charter.

 

		11.	This
                                         Letter Agreement shall be governed by and construed and enforced in accordance with the
                                         laws of the State of New York, without giving effect to conflicts of law principles that
                                         would result in the application of the substantive laws of another jurisdiction. The
                                         undersigned hereby (i) agrees that any action, proceeding or claim against him arising
                                         out of or relating in any way to this Letter Agreement shall be brought and enforced
                                         in the courts of the State of New York of the United States of America for the Southern
                                         District of New York, and irrevocably submits to such jurisdiction, which jurisdiction
                                         shall be exclusive and (ii) waives any objection to such exclusive jurisdiction and that
                                         such courts represent an inconvenient forum.

 

		12.	As
                                         used herein, (i) a “Business Combination” shall mean a merger,
                                         share exchange, asset acquisition, stock purchase, recapitalization, reorganization or
                                         other similar business combination with one or more businesses or entities; (ii) “Insiders”
                                         shall mean all officers, directors and sponsors of the Company immediately prior to the
                                         IPO; (iii) “Founder Shares” shall mean the 2,875,000 shares
                                         of Common Stock of the Company acquired by the Sponsor prior to the IPO; (iv) “IPO
                                         Shares” shall mean the shares of Common Stock issued in the Company’s
                                         IPO; (v) “Private Placement Warrants” shall mean the warrants
                                         that are being sold privately by the Company simultaneously with the consummation of
                                         the IPO; (vi) “Trust Account” shall mean the trust account
                                         into which the net proceeds of the Company’s IPO and a portion of the proceeds
                                         from the sale of the Private Placement Warrants will be deposited; and (vii) “Registration
                                         Statement” means the Company’s registration statement on Form S-1
                                         (SEC File No. 333-230893) filed with the Securities and Exchange Commission, as amended.

 

		13.	This
                                         Letter Agreement constitutes the entire agreement and understanding of the parties hereto
                                         in respect of the subject matter hereof and supersedes all prior understandings, agreements,
                                         or representations by or among the parties hereto, written or oral, to the extent they
                                         relate in any way to the subject matter hereof or the transactions contemplated hereby.
                                         This Letter Agreement may not be changed, amended, modified or waived (other than to
                                         correct a typographical error) as to any particular provision, except by a written instrument
                                         executed by all parties hereto.

 

		14.	The
                                         undersigned acknowledges and understands that the Representative and the Company will
                                         rely upon the agreements, representations and warranties set forth herein in proceeding
                                         with the IPO. Nothing contained herein shall be deemed to render the any Representative
                                         a representative of, or a fiduciary with respect to, the Company, its shareholders or
                                         any creditor or vendor of the Company with respect to the subject matter hereof.

 

		15.	This
                                         Letter Agreement shall be binding on the undersigned and such person’s respective
                                         successors, heirs, personal representatives and assigns. This Letter Agreement shall
                                         terminate on the earlier of (i) the consummation of a Business Combination and (ii) the
                                         liquidation of the Company; provided that such termination shall not relieve the undersigned
                                         from liability for any breach of this agreement prior to its termination. The parties
                                         hereto may not assign either this Letter Agreement or any of their rights, interests,
                                         or obligations hereunder without the prior written consent of the other party. Any purported
                                         assignment in violation of this paragraph shall be void and ineffectual and shall not
                                         operate to transfer or assign any interest or title to the purported assignee.

 

    3

     

    

 

[Signature
Page Follows]

 

    4

     

    
 

	 

        
	Sincerely,
	 	By:	/s/
    Roderick Wong
	 	 	Name of Insider: Roderick
    Wong, MD

 

	 	Acknowledged
    and Agreed:
	 	Health
    Sciences Acquisitions Corporation
	 	By:	/s/
    Roderick Wong
	 	 	Name: Roderick Wong,
    MD
	 	 	Title: President

 

    

     

    

 

May
9, 2019

 

Health
Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

 

Chardan
Capital Markets LLC

17 State Street

New York, NY 10004

 

Re:
Initial Public Offering

 

Ladies
and Gentlemen:

 

This
letter (the “Letter Agreement”) is being delivered to you in accordance with the Underwriting Agreement
(the “Underwriting Agreement”) entered into by and between Health Sciences Acquisitions Corporation,
a Delaware corporation (the “Company”) and Chardan Capital Markets LLC (the “Representative”),
relating to an underwritten initial public offering (the “IPO”) of the Company’s units (the “Units”),
each Unit comprised of one share of common stock of the Company, par value $0.0001 per share (the “Common Stock”),
and one redeemable warrant, each whole warrant exercisable for one-half of one share of Common Stock (each, a “Warrant”).
Certain capitalized terms used herein are defined in paragraph 12 hereof.

 

In
order to induce the Company and the Representative to enter into the Underwriting Agreement and to proceed with the IPO, and in
recognition of the benefit that such IPO will confer upon the undersigned, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the undersigned hereby agrees with the Company as follows:

 

		1.	If
                                         the Company solicits approval of its shareholders of a Business Combination, the undersigned
                                         will vote all shares beneficially owned by him or her, whether acquired before, in or
                                         after the IPO, in favor of such Business Combination.

 

		2.	In
                                         the event that the Company fails to consummate a Business Combination within the time
                                         period set forth in the Company’s amended and restated certificate of incorporation,
                                         as the same may be further amended from time to time (the “Charter”),
                                         the undersigned will, as promptly as possible, take all necessary actions to cause the
                                         Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly
                                         as reasonably possible, but not more than 10 business days thereafter, redeem the IPO
                                         Shares, at a per-share price, payable in cash, equal to the aggregate amount then on
                                         deposit in the Trust Account, including interest earned on the Trust Account not previously
                                         released to the Company (less taxes payable), divided by the number of then outstanding
                                         IPO Shares, which redemption will completely extinguish public shareholders’ rights
                                         as shareholders (including the right to receive further liquidation distributions, if
                                         any), and (iii) as promptly as reasonably possible following such redemption, subject
                                         to the approval of the Company’s remaining shareholders and the Company’s
                                         board of directors, dissolve and liquidate, subject in the cases of clauses (ii) and
                                         (iii) to the Company’s obligations under Delaware law to provide for claims of
                                         creditors and other requirements of applicable law. The undersigned hereby waives any
                                         and all right, title, interest or claim of any kind in or to any distribution of the
                                         Trust Account and any remaining net assets of the Company as a result of such liquidation
                                         with respect to the Founder Shares owned by the undersigned. However, if any of the undersigned
                                         have acquired IPO Shares in or after the IPO, they will be entitled to liquidating distributions
                                         from the Trust Account with respect to such IPO Shares in the event that the Company
                                         fails to consummate a Business Combination within the time period set forth in the Charter.
                                         The undersigned acknowledges and agrees that there will be no distribution from the Trust
                                         Account with respect to any Warrants, all rights of which will terminate on the Company’s
                                         liquidation.

 

    

    

    

 

		3.	The
                                         undersigned acknowledges and agrees that prior to entering into a definitive agreement
                                         for a Business Combination with a target business that is affiliated with the undersigned
                                         or any other Insiders of the Company or their affiliates, such transaction must be approved
                                         by a majority of the Company’s disinterested independent directors and the Company
                                         must obtain an opinion from an independent investment banking firm, which is a member
                                         of the Financial Industry Regulatory Authority, or an independent accounting firm that
                                         such Business Combination is fair to the Company’s unaffiliated shareholders from
                                         a financial point of view.

 

		4.	None
                                         of the undersigned, any member of the family of any of the undersigned, or any affiliate
                                         of the undersigned will be entitled to receive and will not accept any compensation or
                                         other cash payment prior to, or for services rendered in order to effectuate, the consummation
                                         of the Business Combination; provided that the Company shall be allowed to make the payments
                                         set forth in the Registration Statement adjacent to the caption “Prospectus Summary—The
                                         Offering—Limited payments to insiders.”

 

		5.	

 

		(a)	In
                                         order to minimize potential conflicts of interest that may arise from multiple corporate
                                         affiliations, the undersigned hereby agrees that until the earliest of the Company’s
                                         initial Business Combination or liquidation, the undersigned shall present to the Company
                                         for its consideration, prior to presentation to any other entity, any target business
                                         that has a fair market value of at least 80% of the assets held in the Trust Account
                                         (excluding the amount of deferred underwriting discounts held in trust and taxes payable
                                         on the interest earned on the trust account), subject to any existing or future fiduciary
                                         or contractual obligations the undersigned might have.

 

		(b)	The
                                         undersigned hereby agrees and acknowledges that (i) the Representative and the Company
                                         would be irreparably injured in the event of a breach of the obligations under paragraph
                                         6(a) above, (ii) monetary damages may not be an adequate remedy for such breach and (iii)
                                         the non-breaching party shall be entitled to injunctive relief, in addition to any other
                                         remedy that such party may have in law or in equity, in the event of such breach.

 

		6.	The
                                         undersigned agrees to be a director or officer of the Company, as applicable, until the
                                         earlier of the consummation by the Company of an initial Business Combination or the
                                         liquidation of the Company. The undersigned’s biographical information previously
                                         furnished to the Company and the Representative is true and accurate in all material
                                         respects, does not omit any material information with respect to the undersigned’s
                                         background and contains all of the information required to be disclosed pursuant to Item
                                         401 of Regulation S-K, promulgated under the Securities Act of 1933, as amended. The
                                         undersigned’s FINRA Questionnaire previously furnished to the Company and the Representative
                                         is true and accurate in all material respects. The undersigned represents and warrants
                                         that:

 

		(a)	He
                                         or she is not subject to, or a respondent in, any legal action for, any injunction, cease-and-desist
                                         order or order or stipulation to desist or refrain from any act or practice relating
                                         to the offering of securities in any jurisdiction;

 

		(b)	He
                                         or she has never been convicted of or pleaded guilty to any crime (i) involving any fraud
                                         or (ii) relating to any financial transaction or handling of funds of another person,
                                         or (iii) pertaining to any dealings in any securities and he is not currently a defendant
                                         in any such criminal proceeding; and

 

		(c)	he
                                         or she has never been suspended or expelled from membership in any securities or commodities
                                         exchange or association or had a securities or commodities license or registration denied,
                                         suspended or revoked.

 

		7.	The
                                         undersigned has full right and power, without violating any agreement by which he or
                                         she is bound, to enter into this Letter Agreement and to serve as a director or officer
                                         of the Company, as applicable.

 

		8.	The
                                         undersigned hereby waives his or her right to exercise redemption rights with respect
                                         to any of the Company’s Common Stock owned or to be owned by the undersigned, directly
                                         or indirectly, whether such shares be part of the Founder Shares or IPO Shares, and agrees
                                         that he or she will not seek redemption with respect to such shares (or sell such shares
                                         to the Company in any tender offer) in connection with any vote to approve a Business
                                         Combination.

 

    2

    

    

 

		9.	The
                                         undersigned hereby agrees to not propose, or vote in favor of, an amendment to Article
                                         6 of the Charter prior to the consummation of a Business Combination unless the Company
                                         provides public shareholders with the opportunity to redeem their IPO Shares upon such
                                         approval in accordance with such Article 6 thereof.

 

		10.	The
                                         undersigned agrees not to participate in the formation of, or become an officer or director
                                         of, any other blank check company (excluding existing affiliations), until the Company
                                         has entered into a definitive agreement with respect to an initial Business Combination
                                         or the Company has failed to complete an initial Business Combination within the time
                                         period set forth in the Charter.

 

		11.	This
                                         Letter Agreement shall be governed by and construed and enforced in accordance with the
                                         laws of the State of New York, without giving effect to conflicts of law principles that
                                         would result in the application of the substantive laws of another jurisdiction. The
                                         undersigned hereby (i) agrees that any action, proceeding or claim against him arising
                                         out of or relating in any way to this Letter Agreement shall be brought and enforced
                                         in the courts of the State of New York of the United States of America for the Southern
                                         District of New York, and irrevocably submits to such jurisdiction, which jurisdiction
                                         shall be exclusive and (ii) waives any objection to such exclusive jurisdiction and that
                                         such courts represent an inconvenient forum.

 

		12.	As
                                         used herein, (i) a “Business Combination” shall mean a merger,
                                         share exchange, asset acquisition, stock purchase, recapitalization, reorganization or
                                         other similar business combination with one or more businesses or entities; (ii) “Insiders”
                                         shall mean all officers, directors and sponsors of the Company immediately prior to the
                                         IPO; (iii) “Founder Shares” shall mean the 2,875,000 shares
                                         of Common Stock of the Company acquired by the Sponsor prior to the IPO; (iv) “IPO
                                         Shares” shall mean the shares of Common Stock issued in the Company’s
                                         IPO; (v) “Private Placement Warrants” shall mean the warrants
                                         that are being sold privately by the Company simultaneously with the consummation of
                                         the IPO; (vi) “Trust Account” shall mean the trust account
                                         into which the net proceeds of the Company’s IPO and a portion of the proceeds
                                         from the sale of the Private Placement Warrants will be deposited; and (vii) “Registration
                                         Statement” means the Company’s registration statement on Form S-1
                                         (SEC File No. 333-230893) filed with the Securities and Exchange Commission, as amended.

 

		13.	This
                                         Letter Agreement constitutes the entire agreement and understanding of the parties hereto
                                         in respect of the subject matter hereof and supersedes all prior understandings, agreements,
                                         or representations by or among the parties hereto, written or oral, to the extent they
                                         relate in any way to the subject matter hereof or the transactions contemplated hereby.
                                         This Letter Agreement may not be changed, amended, modified or waived (other than to
                                         correct a typographical error) as to any particular provision, except by a written instrument
                                         executed by all parties hereto.

 

		14.	The
                                         undersigned acknowledges and understands that the Representative and the Company will
                                         rely upon the agreements, representations and warranties set forth herein in proceeding
                                         with the IPO. Nothing contained herein shall be deemed to render the any Representative
                                         a representative of, or a fiduciary with respect to, the Company, its shareholders or
                                         any creditor or vendor of the Company with respect to the subject matter hereof.

 

		15.	This
                                         Letter Agreement shall be binding on the undersigned and such person’s respective
                                         successors, heirs, personal representatives and assigns. This Letter Agreement shall
                                         terminate on the earlier of (i) the consummation of a Business Combination and (ii) the
                                         liquidation of the Company; provided that such termination shall not relieve the undersigned
                                         from liability for any breach of this agreement prior to its termination. The parties
                                         hereto may not assign either this Letter Agreement or any of their rights, interests,
                                         or obligations hereunder without the prior written consent of the other party. Any purported
                                         assignment in violation of this paragraph shall be void and ineffectual and shall not
                                         operate to transfer or assign any interest or title to the purported assignee.

 

    3

    

    

 

[Signature
Page Follows]

 

    4

    

    

 

	 	Sincerely,
	 	By:	/s/
    Stephanie A. Sirota
	 	 	Name
    of Insider: Stephanie A. Sirota

 

	 	Acknowledged
    and Agreed:
	 	Health
    Sciences Acquisitions Corporation
	 	By:	/s/
    Roderick Wong
	 	 	Name:
    Roderick Wong, MD
	 	 	Title:
    President

 

    

    

    

 

May
9, 2019

 

Health
Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

 

Chardan
Capital Markets LLC

17 State Street

New York, NY 10004

 

Re:
Initial Public Offering

 

Ladies
and Gentlemen:

 

This
letter (the “Letter Agreement”) is being delivered to you in accordance with the Underwriting Agreement
(the “Underwriting Agreement”) entered into by and between Health Sciences Acquisitions Corporation,
a Delaware corporation (the “Company”) and Chardan Capital Markets LLC (the “Representative”),
relating to an underwritten initial public offering (the “IPO”) of the Company’s units (the “Units”),
each Unit comprised of one share of common stock of the Company, par value $0.0001 per share (the “Common Stock”),
and one redeemable warrant, each whole warrant exercisable for one-half of one share of Common Stock (each, a “Warrant”).
Certain capitalized terms used herein are defined in paragraph 12 hereof.

 

In
order to induce the Company and the Representative to enter into the Underwriting Agreement and to proceed with the IPO, and in
recognition of the benefit that such IPO will confer upon the undersigned, and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the undersigned hereby agrees with the Company as follows:

 

		1.	If
                                         the Company solicits approval of its shareholders of a Business Combination, the undersigned
                                         will vote all shares beneficially owned by him or her, whether acquired before, in or
                                         after the IPO, in favor of such Business Combination.

 

		2.	In
                                         the event that the Company fails to consummate a Business Combination within the time
                                         period set forth in the Company’s amended and restated certificate of incorporation,
                                         as the same may be further amended from time to time (the “Charter”),
                                         the undersigned will, as promptly as possible, take all necessary actions to cause the
                                         Company to (i) cease all operations except for the purpose of winding up, (ii) as promptly
                                         as reasonably possible, but not more than 10 business days thereafter, redeem the IPO
                                         Shares, at a per-share price, payable in cash, equal to the aggregate amount then on
                                         deposit in the Trust Account, including interest earned on the Trust Account not previously
                                         released to the Company (less taxes payable), divided by the number of then outstanding
                                         IPO Shares, which redemption will completely extinguish public shareholders’ rights
                                         as shareholders (including the right to receive further liquidation distributions, if
                                         any), and (iii) as promptly as reasonably possible following such redemption, subject
                                         to the approval of the Company’s remaining shareholders and the Company’s
                                         board of directors, dissolve and liquidate, subject in the cases of clauses (ii) and
                                         (iii) to the Company’s obligations under Delaware law to provide for claims of
                                         creditors and other requirements of applicable law. The undersigned hereby waives any
                                         and all right, title, interest or claim of any kind in or to any distribution of the
                                         Trust Account and any remaining net assets of the Company as a result of such liquidation
                                         with respect to the Founder Shares owned by the undersigned. However, if any of the undersigned
                                         have acquired IPO Shares in or after the IPO, they will be entitled to liquidating distributions
                                         from the Trust Account with respect to such IPO Shares in the event that the Company
                                         fails to consummate a Business Combination within the time period set forth in the Charter.
                                         The undersigned acknowledges and agrees that there will be no distribution from the Trust
                                         Account with respect to any Warrants, all rights of which will terminate on the Company’s
                                         liquidation.

 

    

    

    

 

		3.	The
                                         undersigned acknowledges and agrees that prior to entering into a definitive agreement
                                         for a Business Combination with a target business that is affiliated with the undersigned
                                         or any other Insiders of the Company or their affiliates, such transaction must be approved
                                         by a majority of the Company’s disinterested independent directors and the Company
                                         must obtain an opinion from an independent investment banking firm, which is a member
                                         of the Financial Industry Regulatory Authority, or an independent accounting firm that
                                         such Business Combination is fair to the Company’s unaffiliated shareholders from
                                         a financial point of view.

 

		4.	None
                                         of the undersigned, any member of the family of any of the undersigned, or any affiliate
                                         of the undersigned will be entitled to receive and will not accept any compensation or
                                         other cash payment prior to, or for services rendered in order to effectuate, the consummation
                                         of the Business Combination; provided that the Company shall be allowed to make the payments
                                         set forth in the Registration Statement adjacent to the caption “Prospectus Summary—The
                                         Offering—Limited payments to insiders.”

 

		5.	

 

		(a)	In
                                         order to minimize potential conflicts of interest that may arise from multiple corporate
                                         affiliations, the undersigned hereby agrees that until the earliest of the Company’s
                                         initial Business Combination or liquidation, the undersigned shall present to the Company
                                         for its consideration, prior to presentation to any other entity, any target business
                                         that has a fair market value of at least 80% of the assets held in the Trust Account
                                         (excluding the amount of deferred underwriting discounts held in trust and taxes payable
                                         on the interest earned on the trust account), subject to any existing or future fiduciary
                                         or contractual obligations the undersigned might have.

 

		(b)	The
                                         undersigned hereby agrees and acknowledges that (i) the Representative and the Company
                                         would be irreparably injured in the event of a breach of the obligations under paragraph
                                         6(a) above, (ii) monetary damages may not be an adequate remedy for such breach and (iii)
                                         the non-breaching party shall be entitled to injunctive relief, in addition to any other
                                         remedy that such party may have in law or in equity, in the event of such breach.

 

		6.	The
                                         undersigned agrees to be a director or officer of the Company, as applicable, until the
                                         earlier of the consummation by the Company of an initial Business Combination or the
                                         liquidation of the Company. The undersigned’s biographical information previously
                                         furnished to the Company and the Representative is true and accurate in all material
                                         respects, does not omit any material information with respect to the undersigned’s
                                         background and contains all of the information required to be disclosed pursuant to Item
                                         401 of Regulation S-K, promulgated under the Securities Act of 1933, as amended. The
                                         undersigned’s FINRA Questionnaire previously furnished to the Company and the Representative
                                         is true and accurate in all material respects. The undersigned represents and warrants
                                         that:

 

		(a)	He
                                         or she is not subject to, or a respondent in, any legal action for, any injunction, cease-and-desist
                                         order or order or stipulation to desist or refrain from any act or practice relating
                                         to the offering of securities in any jurisdiction;

 

		(b)	He
                                         or she has never been convicted of or pleaded guilty to any crime (i) involving any fraud
                                         or (ii) relating to any financial transaction or handling of funds of another person,
                                         or (iii) pertaining to any dealings in any securities and he is not currently a defendant
                                         in any such criminal proceeding; and

 

		(c)	he
                                         or she has never been suspended or expelled from membership in any securities or commodities
                                         exchange or association or had a securities or commodities license or registration denied,
                                         suspended or revoked.

 

		7.	The
                                         undersigned has full right and power, without violating any agreement by which he or
                                         she is bound, to enter into this Letter Agreement and to serve as a director or officer
                                         of the Company, as applicable.

 

		8.	The
                                         undersigned hereby waives his or her right to exercise redemption rights with respect
                                         to any of the Company’s Common Stock owned or to be owned by the undersigned, directly
                                         or indirectly, whether such shares be part of the Founder Shares or IPO Shares, and agrees
                                         that he or she will not seek redemption with respect to such shares (or sell such shares
                                         to the Company in any tender offer) in connection with any vote to approve a Business
                                         Combination.

 

    2

    

    

 

		9.	The
                                         undersigned hereby agrees to not propose, or vote in favor of, an amendment to Article
                                         6 of the Charter prior to the consummation of a Business Combination unless the Company
                                         provides public shareholders with the opportunity to redeem their IPO Shares upon such
                                         approval in accordance with such Article 6 thereof.

 

		10.	The
                                         undersigned agrees not to participate in the formation of, or become an officer or director
                                         of, any other blank check company (excluding existing affiliations), until the Company
                                         has entered into a definitive agreement with respect to an initial Business Combination
                                         or the Company has failed to complete an initial Business Combination within the time
                                         period set forth in the Charter.

 

		11.	This
                                         Letter Agreement shall be governed by and construed and enforced in accordance with the
                                         laws of the State of New York, without giving effect to conflicts of law principles that
                                         would result in the application of the substantive laws of another jurisdiction. The
                                         undersigned hereby (i) agrees that any action, proceeding or claim against him arising
                                         out of or relating in any way to this Letter Agreement shall be brought and enforced
                                         in the courts of the State of New York of the United States of America for the Southern
                                         District of New York, and irrevocably submits to such jurisdiction, which jurisdiction
                                         shall be exclusive and (ii) waives any objection to such exclusive jurisdiction and that
                                         such courts represent an inconvenient forum.

 

		12.	As
                                         used herein, (i) a “Business Combination” shall mean a merger,
                                         share exchange, asset acquisition, stock purchase, recapitalization, reorganization or
                                         other similar business combination with one or more businesses or entities; (ii) “Insiders”
                                         shall mean all officers, directors and sponsors of the Company immediately prior to the
                                         IPO; (iii) “Founder Shares” shall mean the 2,875,000 shares
                                         of Common Stock of the Company acquired by the Sponsor prior to the IPO; (iv) “IPO
                                         Shares” shall mean the shares of Common Stock issued in the Company’s
                                         IPO; (v) “Private Placement Warrants” shall mean the warrants
                                         that are being sold privately by the Company simultaneously with the consummation of
                                         the IPO; (vi) “Trust Account” shall mean the trust account
                                         into which the net proceeds of the Company’s IPO and a portion of the proceeds
                                         from the sale of the Private Placement Warrants will be deposited; and (vii) “Registration
                                         Statement” means the Company’s registration statement on Form S-1
                                         (SEC File No. 333-230893) filed with the Securities and Exchange Commission, as amended.

 

		13.	This
                                         Letter Agreement constitutes the entire agreement and understanding of the parties hereto
                                         in respect of the subject matter hereof and supersedes all prior understandings, agreements,
                                         or representations by or among the parties hereto, written or oral, to the extent they
                                         relate in any way to the subject matter hereof or the transactions contemplated hereby.
                                         This Letter Agreement may not be changed, amended, modified or waived (other than to
                                         correct a typographical error) as to any particular provision, except by a written instrument
                                         executed by all parties hereto.

 

		14.	The
                                         undersigned acknowledges and understands that the Representative and the Company will
                                         rely upon the agreements, representations and warranties set forth herein in proceeding
                                         with the IPO. Nothing contained herein shall be deemed to render the any Representative
                                         a representative of, or a fiduciary with respect to, the Company, its shareholders or
                                         any creditor or vendor of the Company with respect to the subject matter hereof.

 

		15.	This
                                         Letter Agreement shall be binding on the undersigned and such person’s respective
                                         successors, heirs, personal representatives and assigns. This Letter Agreement shall
                                         terminate on the earlier of (i) the consummation of a Business Combination and (ii) the
                                         liquidation of the Company; provided that such termination shall not relieve the undersigned
                                         from liability for any breach of this agreement prior to its termination. The parties
                                         hereto may not assign either this Letter Agreement or any of their rights, interests,
                                         or obligations hereunder without the prior written consent of the other party. Any purported
                                         assignment in violation of this paragraph shall be void and ineffectual and shall not
                                         operate to transfer or assign any interest or title to the purported assignee.

 

    3

    

    

 

[Signature
Page Follows]

 

    4

    

    

 

	 	Sincerely,
	 	By:	/s/
    Sukumar Nagendran
	 	 	Name
    of Insider: Sukumar Nagendran, MD

 

	 	Acknowledged
    and Agreed:
	 	Health
    Sciences Acquisitions Corporation
	 	By:	/s/
    Roderick Wong
	 	 	Name:
    Roderick Wong, MD
	 	 	Title:
    PresidentExhibit 10.3 

 

INVESTMENT
MANAGEMENT TRUST AGREEMENT

 

This
Investment Management Trust Agreement (this “Agreement”) is made as of May 9, 2019 by and between Health Sciences
Acquisitions Corporation (the “Company”) and Continental Stock Transfer & Trust Company, a New York corporation
(the “Trustee”).

 

WHEREAS,
the Company’s registration statement on Form S-1, No. 333-230893 (“Registration Statement”), for its initial
public offering of securities (“IPO”) has been declared effective as of the date hereof (“Effective Date”)
by the U.S. Securities and Exchange Commission (capitalized terms used herein and not otherwise defined shall have the meanings
set forth in the Registration Statement); and

 

WHEREAS,
Chardan Capital Markets LLC is acting as the underwriter (the “Underwriter”) in the IPO pursuant to an underwriting
agreement between the Company and the underwriters (“Underwriting Agreement”); and

 

WHEREAS,
simultaneously with the IPO, the Company’s sponsor will be purchasing 10,000,000 warrants (“Private Placement Warrants”)
from the Company for an aggregate purchase price of $5,000,000; and

 

WHEREAS,
as described in the Registration Statement, and in accordance with the Company’s Amended and Restated Certificate of Incorporation,
as the same may be amended from time to time (the “Charter”), $105,000,000 of the gross proceeds of the IPO and sale
of the Private Placement Warrants ($120,000,000 if the underwriters’ over-allotment option is exercised in full) will be
delivered to the Trustee to be deposited and held in a segregated trust account located at all times in the United States (the
“Trust Account”) for the benefit of the Company and the holders of the Company’s shares of common stock, par
value $0.0001 per share (“Common Stock”), issued in the IPO as hereinafter provided (the amount to be delivered to
the Trustee will be referred to herein as the “Property”; the shareholders for whose benefit the Trustee shall hold
the Property will be referred to as the “Public Shareholders,” and the Public Shareholders and the Company will be
referred to together as the “Beneficiaries”); and

 

WHEREAS,
pursuant to the Underwriting Agreement, a portion of the Property equal to $3,500,000 or $4,025,000 if the underwriters’
over-allotment option is exercised in full is attributable to deferred underwriting discounts and commissions that may become
payable by the Company to the underwriters upon the consummation of an initial business combination (as described in the Registration
Statement, a “Business Combination”) (the “Deferred Discount”); and

 

WHEREAS,
the Company and the Trustee desire to enter into this Agreement to set forth the terms and conditions pursuant to which the Trustee
shall hold the Property.

 

NOW
THEREFORE, IT IS AGREED:

 

1.             Agreements
and Covenants of Trustee. The Trustee hereby agrees and covenants to:

 

(a)       Hold
the Property in trust for the Beneficiaries in accordance with the terms of this Agreement in the Trust Account established by
the Trustee in the United States at JPMorgan Chase Bank, N.A. and at a brokerage institution selected by the Trustee that is reasonably
satisfactory to the Company;

 

(b)       Manage,
supervise and administer the Trust Account subject to the terms and conditions set forth herein;

 

(c)       In
a timely manner, upon the written instruction of the Company, invest and reinvest the Property in United States government securities
within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended, having a maturity of 180 days or less,
or in money market funds meeting the conditions of paragraphs (d)(1), (d)(2), (d)(3) and (d)(4) of Rule 2a-7 promulgated under
the Investment Company Act of 1940, as amended, which invest only in direct U.S. government treasury obligations, as determined
by the Company; it being understood that the Trust Account will earn no interest while account funds are uninvested awaiting the
Company’s instructions hereunder and the Trustee may earn bank credits or other consideration;

 

    

    

    

 

(d)       Collect
and receive, when due, all principal, interest or other income arising from the Property, which shall become part of the “Property,”
as such term is used herein;

 

(e)       Promptly
notify the Company and the Underwriter of all communications received by the Trustee with respect to any Property requiring action
by the Company;

 

(f)        Supply
any necessary information or documents as may be requested by the Company (or its authorized agents) in connection with the Company’s
preparation of the tax returns relating to assets held in the Trust Account;

 

(g)       Participate
in any plan or proceeding for protecting or enforcing any right or interest arising from the Property if, as and when instructed
by the Company to do so;

 

(h)       Render
to the Company monthly written statements of the activities of, and amounts in, the Trust Account reflecting all receipts and
disbursements of the Trust Account;

 

(i)        Commence
liquidation of the Trust Account only after and promptly after (x) receipt of, and only in accordance with, the terms of a letter
from the Company (“Termination Letter”) in a form substantially similar to that attached hereto as either Exhibit
A or Exhibit B, as applicable, signed on behalf of the Company by its Chief Executive Officer, Chief Financial Officer
or Chairman of the Board of Directors of the Company (the “Board”) or other authorized officers of the Company, and
complete the liquidation of the Trust Account and distribute the Property in the Trust Account, including any amounts representing
interest earned on the funds held in the Trust Account (less taxes payable), only as directed in the Termination Letter and the
other documents referred to therein; or (y) the later of (1) 24 months after the closing of the Offering and (2) such later date
as may be approved by the Company’s shareholders in accordance with the Company’s Charter, if a Termination Letter
has not been received by the Trustee prior to such date, in which case the Trust Account shall be liquidated in accordance with
the procedures set forth in the Termination Letter attached as Exhibit B and the Property in the Trust Account, including
any amounts representing interest earned on the funds held in the Trust Account (less taxes payable, it being understood that
the Trustee has no obligation to monitor or question the Company’s position that an allocation has been made for taxes payable),
shall be distributed to the Public Shareholders of record as of such date; provided, however, that in the event the Trustee receives
a Termination Letter in a form substantially similar to Exhibit B hereto, or if the Trustee begins to liquidate the Property
because it has received no such Termination Letter by the date specified in clause (y) of this Section 1(i), the
Trustee shall keep the Trust Account open until twelve (12) months following the date the Property has been distributed to the
Public Shareholders;

 

(j)        Upon
written request from the Company, which may be given from time to time in a form substantially similar to that attached hereto
as Exhibit C (a “Tax Payment Withdrawal Instruction”), withdraw from the Trust Account and distribute to the
Company the amount of interest earned on the Property requested by the Company to cover any tax obligation owed by the Company,
which amount shall be delivered directly to the Company by electronic funds transfer or other method of prompt payment, and the
Company shall forward such payment to the relevant taxing authority so long as there is no reduction in the principal amount initially
deposited in the Trust Account; provided, however, that to the extent there is not sufficient cash in the Trust Account
to pay such tax obligation, the Trustee shall liquidate such assets held in the Trust Account as shall be designated by the Company
in writing to make such distribution (it being acknowledged and agreed that any such amount in excess of interest income earned
on the Property shall not be payable from the Trust Account). The written request of the Company referenced above shall constitute
presumptive evidence that the Company is entitled to said funds, and the Trustee shall have no responsibility to look beyond said
request; and

 

(k)       Not
make any withdrawals or distributions from the Trust Account other than pursuant to Sections 1(i) or (j) above.

 

2.             Agreements
and Covenants of the Company. The Company hereby agrees and covenants to:

 

    2

    

    

 

(a)       Give
all instructions to the Trustee hereunder in writing, signed by the Company’s Chairman of the Board, Chief Executive Officer,
Chief Financial Officer or other authorized officer of the Company. In addition, except with respect to its duties under Sections
1(i), or (j) hereof, the Trustee shall be entitled to rely on, and shall be protected in relying on, any verbal or
telephonic advice or instruction which it in good faith and with reasonable care believes to be given by any one of the persons
authorized above to give written instructions, provided that the Company shall promptly confirm such instructions in writing;

 

(b)       Subject
to the provisions of Section 4 of this Agreement, hold the Trustee harmless and indemnify the Trustee from and against,
any and all expenses, including reasonable counsel fees and disbursements, or losses suffered by the Trustee in connection with
any claim, potential claim, action, suit or other proceeding brought against the Trustee involving any claim, or in connection
with any claim or demand, which in any way arises out of or relates to this Agreement, the services of the Trustee hereunder,
or the Property or any interest earned on the Property, except for expenses and losses resulting from the Trustee’s gross
negligence, fraud or willful misconduct. Promptly after the receipt by the Trustee of notice of demand or claim or the commencement
of any action, suit or proceeding, pursuant to which the Trustee intends to seek indemnification under this Section 2(b),
it shall notify the Company in writing of such claim (hereinafter referred to as the “Indemnified Claim”). The Trustee
shall have the right to conduct and manage the defense against such Indemnified Claim; provided, that the Trustee shall obtain
the consent of the Company with respect to the selection of counsel, which consent shall not be unreasonably withheld. The Trustee
may not agree to settle any Indemnified Claim without the prior written consent of the Company, which consent shall not be unreasonably
withheld. The Company may participate in such action with its own counsel;

 

(c)       Pay
the Trustee an initial acceptance fee, an annual fee and a transaction processing fee for each disbursement made as set forth
on Schedule A hereto, which fees shall be subject to modification by the parties from time to time. It is expressly understood
that the Property shall not be used to pay such fees unless the disbursements are made to the Company pursuant to Section 1(i)
solely in connection with the consummation of a Business Combination and Section 1(j). The Company shall pay the Trustee
the initial acceptance fee and first year’s fee at the consummation of the IPO and thereafter on the anniversary of the
Effective Date. The Trustee shall refund the Company the annual administration fee (on a pro rata basis) with respect to any period
after the liquidation of the Trust Account. The Company shall not be responsible for any other fees or charges of the Trustee
except as set forth in this Section 2(c), Schedule A and as may be provided in Section 2(b) hereof;

 

(d)       In
connection with any vote of the Company’s shareholders regarding a Business Combination, provide to the Trustee an affidavit
or certificate of a firm regularly engaged in the business of soliciting proxies and/or tabulating shareholder votes (which firm
may be the Trustee) verifying the vote of the Company’s shareholders regarding such Business Combination;

 

(e)       In
connection with the Trustee acting as Paying/Disbursing Agent pursuant to Exhibit B, the Company will not give the Trustee
disbursement instructions which would be prohibited under this Agreement;

 

(f)       Within
five business days after the Underwriter in the IPO, exercises the over-allotment option (or any unexercised portion thereof)
or such over-allotment option expires, provides the Trustee with a notice in writing (with a copy to the Underwriter) of the total
amount of the Deferred Discount;

 

(g)       In
the event the Company is entitled to receive a tax refund on its income tax obligation, and promptly after the amount of such
refund is determined on a final basis, provide the Trustee with notice in writing (with a copy to the Underwriter) of the amount
of such income tax refund; and

 

3.             Limitations
of Liability. The Trustee shall have no responsibility or liability to:

 

(a)       Take
any action with respect to the Property, other than as directed in Section 1 hereof, and the Trustee shall have no liability
to any party except for liability arising out of the Trustee’s gross negligence, fraud or willful misconduct;

 

    3

    

    

 

(b)       Institute
any proceeding for the collection of any principal and income arising from, or institute, appear in or defend any proceeding of
any kind with respect to, any of the Property unless and until it shall have received written instructions from the Company given
as provided herein to do so and the Company shall have advanced or guaranteed to it funds sufficient to pay any expenses incident
thereto;

 

(c)       Change
the investment of any Property, other than in compliance with Section 1 hereof;

 

(d)       Refund
any depreciation in principal of any Property;

 

(e)       Assume
that the authority of any person designated by the Company to give instructions hereunder shall not be continuing unless provided
otherwise in such designation, or unless the Company shall have delivered a written revocation of such authority to the Trustee;

 

(f)       The
other parties hereto or to anyone else for any action taken or omitted by it, or any action suffered by it to be taken or omitted,
in good faith and in the Trustee’s best judgment, except for the Trustee’s gross negligence, fraud or willful misconduct.
The Trustee may rely conclusively and shall be protected in acting upon any order, notice, demand, certificate, opinion or advice
of counsel (including counsel chosen by the Trustee), statement, instrument, report or other paper or document (not only as to
its due execution and the validity and effectiveness of its provisions, but also as to the truth and acceptability of any information
therein contained) which the Trustee believes, in good faith and with reasonable care, to be genuine and to be signed or presented
by the proper person or persons. The Trustee shall not be bound by any notice or demand, or any waiver, modification, termination
or rescission of this Agreement or any of the terms hereof, unless evidenced by a written instrument delivered to the Trustee
signed by the proper party or parties and, if the duties or rights of the Trustee are affected, unless it shall give its prior
written consent thereto;

 

(g)       Verify
the correctness of the information set forth in the Registration Statement or to confirm or assure that any acquisition made by
the Company or any other action taken by it is as contemplated by the Registration Statement;

 

(h)       File
local, state and/or federal tax returns or information returns with any taxing authority on behalf of the Trust Account and payee
statements with the Company documenting the taxes, if any, payable by the Company or the Trust Account, relating to the income
earned on the Property;

 

(i)       Pay
any taxes on behalf of the Trust Account (it being expressly understood that the Property shall not be used to pay any such taxes
and that such taxes, if any, shall be paid by the Company from funds not held in the Trust Account);

 

(j)       Imply
obligations, perform duties, inquire or otherwise be subject to the provisions of any agreement or document other than this agreement
and that which is expressly set forth herein; and

 

(k)       Verify
calculations, qualify or otherwise approve Company’s written requests for distributions pursuant to Sections 1(i),
or (j) hereof.

 

4.             Trust
Account Waiver. The Trustee has no right of set off or any right, title, interest or claim of any kind (“Claim”)
to, or to any monies in, the Trust Account, and hereby irrevocably waives any Claim to, or to any monies in, the Trust Account
that it may have now or in the future. In the event the Trustee has any Claim against the Company under this Agreement, including,
without limitation, under Sections 2(b) or (c) hereof, the Trustee shall pursue such Claim solely against the Company
and its assets outside the Trust Account and not against the Property or any monies in the Trust Account.

 

5.             Termination.
This Agreement shall terminate as follows:

 

(a)       If
the Trustee gives written notice to the Company that it desires to resign under this Agreement, the Company shall use its reasonable
efforts to locate a successor trustee during which time the Trustee shall act in accordance with this Agreement. At such time
that the Company notifies the Trustee that a successor trustee has been appointed by the Company and has agreed to become subject
to the terms of this Agreement, the Trustee shall transfer the management of the Trust Account to the successor trustee, including
but not limited to the transfer of copies of the reports and statements relating to the Trust Account, whereupon this Agreement
shall terminate; provided, however, that, in the event that the Company does not locate a successor trustee within ninety days
of receipt of the resignation notice from the Trustee, the Trustee may submit an application to have the Property deposited with
any court in the State of New York or with the United States District Court for the Southern District of New York and upon such
deposit, the Trustee shall be immune from any liability whatsoever; or

 

    4

    

    

 

(b)       At
such time that the Trustee has completed the liquidation of the Trust Account in accordance with the provisions of Section
1(i) hereof and distributed the Property in accordance with the provisions of the Termination Letter, this Agreement shall
terminate except with respect to Section 2(b).

 

6.       Miscellaneous.

 

(a)       The
Company and the Trustee each acknowledge that the Trustee will follow the security procedures set forth below with respect to
funds transferred from the Trust Account. The Company and the Trustee will each restrict access to confidential information relating
to such security procedures to authorized persons. Each party must notify the other party immediately if it has reason to believe
unauthorized persons may have obtained access to such confidential information, or of any change in its authorized personnel.
In executing funds transfers, the Trustee will rely upon all information supplied to it by the Company, including account names,
account numbers, and all other identifying information relating to a beneficiary, beneficiary’s bank or intermediary bank.
Except for any liability arising out of the Trustee’s gross negligence, fraud or willful misconduct, the Trustee shall not
be liable for any loss, liability or expense resulting from any error in the information or transmission of the funds.

 

(b)       This
Agreement shall be governed by and construed and enforced in accordance with the laws of the State of New York, without giving
effect to conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. This
Agreement may be executed in several original or facsimile counterparts, each one of which shall constitute an original, and together
shall constitute but one instrument.

 

(c)       This
Agreement contains the entire agreement and understanding of the parties hereto with respect to the subject matter hereof. Except
for Sections 1(i) and (j) hereof (which may only be amended with the approval of the holders of a majority of the
outstanding shares of Common Stock sold in the IPO), this Agreement or any provision hereof may only be changed, amended or modified
by a writing signed by each of the parties hereto; provided, however, that no such change, amendment or modification may be made
without the prior written consent of the Underwriter. As to any claim, cross-claim or counterclaim in any way relating to this
Agreement, each party waives the right to trial by jury. The Trustee may require from Company counsel an opinion as to the propriety
of any proposed amendment.

 

(d)       The
parties hereto consent to the jurisdiction and venue of any state or federal court located in the City of New York, State of New
York, for purposes of resolving any disputes hereunder.

 

(e)       Any
notice, consent or request to be given in connection with any of the terms or provisions of this Agreement shall be in writing
and shall be sent by express mail or similar private courier service, by certified mail (return receipt requested), by hand delivery
or by facsimile transmission or by e-mail:

 

if
to the Trustee, to:

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

E-mail: fwolf@continentalstock.com

 

    5

    

    

 

if
to the Company, to:

Health Sciences Acquisitions Corporation

412 West 15th Street, Floor 9

New York, New York 10011

Attn: Alice Lee, Secretary

E-Mail: al@rtwfunds.com

 

in
either case with a copy to:

Chardan Capital Markets, LLC

17 State Street, Suite 1600

New York, NY 10004

Attn: George Kaufman

Facsimile: (646) 465-9039

 

and

 

Loeb
& Loeb LLP

345 Park Avenue

New York, New York 10154

Attn: Giovanni Caruso, Esq.

Facsimile: (212) 407-4990

 

(f)        No
party to this Agreement may assign its rights or delegate its obligations hereunder without the prior consent of the other person
or entity.

 

(g)       Each
of the Trustee and the Company hereby represents that it has the full right and power and has been duly authorized to enter into
this Agreement and to perform its respective obligations as contemplated hereunder. The Trustee acknowledges and agrees that it
shall not make any claims or proceed against the Trust Account, including by way of set-off, and shall not be entitled to any
funds in the Trust Account under any circumstance.

 

(h)       This
Agreement is the joint product of the Company and the Trustee and each provision hereof has been subject to the mutual consultation,
negotiation and agreement of such parties and shall not be construed for or against any party hereto.

 

(i)        This
Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts
shall together constitute one and the same instrument. Delivery of a signed counterpart of this Agreement by facsimile or electronic
transmission shall constitute valid and sufficient delivery thereof.

 

(j)        Each
of the Company and the Trustee hereby acknowledges and agrees that the Underwriter is a third party beneficiary of this Agreement.

 

(k)       Except
as specified herein, no party to this Agreement may assign its rights or delegate its obligations hereunder to any other person
or entity.

 

[Signature
Page Follows]

 

    6

    

    

 

IN
WITNESS WHEREOF, the parties have duly executed this Investment Management Trust Agreement as of the date first written above.

 

	 	CONTINENTAL STOCK TRANSFER &

                                                                     TRUST COMPANY, as Trustee

	 	By:	/s/
    Francis E. Wolf, Jr.
	 	 	Name:
    Francis E. Wolf, Jr.
	 	 	Title:
    Vice President

 

	 	HEALTH SCIENCES ACQUISITIONS

                                                                     CORPORATION, as Company

	 	By:	/s/
    Roderick Wong
	 	 	Name:
    Roderick Wong, MD
	 	 	Title:
    Chief Executive Officer

 

    

    

    

 

SCHEDULE
A

 

	Fee Item	 	Time and method of payment	 	Amount	 
	Initial acceptance fee	 	 	 	Initial closing of IPO by wire transfer	$	$3,500.00	 	
	Annual fee	 	 	 	First year, initial closing of IPO by wire transfer; thereafter on the anniversary of the effective date of the IPO by wire transfer or check	$	10,000.00	 	
	Transaction processing fee for disbursements to Company under Section 1(j)	 	 	 	Deduction by Trustee from accumulated income following disbursement made to Company under Section 2	$	250.00		
	Paying Agent services as required pursuant to Section 1(i)	 		Billed to Company upon delivery of service pursuant to Section 1(i)	 	Prevailing rates	 

 

    Schedule A
Page 1

    

    

 

EXHIBIT
A

 

[Letterhead
of Company]

 

[Insert
date]

 

Continental
Stock Transfer

& Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

 

	 	Re:	Trust
    Account No. [●] Termination Letter

 

Dear
Sir or Madam:

 

Pursuant
to Section 1(i) of the Investment Management Trust Agreement between Health Sciences Acquisitions Corporation (the “Company”)
and Continental Stock Transfer & Trust Company (“Trustee”), dated as of [●], 2019 (the “Trust Agreement”),
this is to advise you that the Company has entered into an agreement with [●] (“Target Business”) to consummate
a business combination with Target Business (the “Business Combination”) on or about [●]. The Company
shall notify you at least 48 hours in advance of the actual date of the consummation of the Business Combination (the “Consummation
Date”). Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

 

In
accordance with the terms of the Trust Agreement, we hereby authorize you to commence to liquidate the Trust Account investments
on [●] and to transfer the proceeds to the above-referenced account at JPMorgan Chase Bank, N.A. to the effect that, on
the Consummation Date, all of funds held in the Trust Account will be immediately available for transfer to the account or accounts
that the Company shall direct on the Consummation Date. It is acknowledged and agreed that while the funds are on deposit in the
trust account awaiting distribution, the Company will not earn any interest or dividends.

 

On
the Consummation Date (i) counsel for the Company shall deliver to you written notification that the Business Combination has
been consummated, (ii) the Company shall deliver to you (a) [an affidavit] [a certificate] of [•] which verifies the vote
of the Company’s shareholders in connection with the Business Combination and (b) written instructions with respect to the
transfer of the funds held in the Trust Account (“Instruction Letter”) and (iii) the Underwriter shall deliver to
you written instructions for delivery of the Deferred Discount. You are hereby directed and authorized to transfer the funds held
in the Trust Account immediately upon your receipt of the counsel’s letter and the Instruction Letter, (x) to the Underwriter
in an amount equal to the Deferred Discount as directed by the Underwriter and (y) the remainder in accordance with the terms
of the Instruction Letter. In the event that certain deposits held in the Trust Account may not be liquidated by the Consummation
Date without penalty, you will notify the Company of the same and the Company shall direct you as to whether such funds should
remain in the Trust Account and be distributed after the Consummation Date to the Company. Upon the distribution of all the funds
in the Trust Account pursuant to the terms hereof, the Trust Agreement shall be terminated.

 

	 	A-1	

 

     Exhibit A
Page 1

    

    

 

In
the event that the Business Combination is not consummated on the Consummation Date described in the notice thereof and the Company
has not notified you on or before the original Consummation Date of a new Consummation Date, then upon receipt by the Trustee
of written instructions from the Company, the funds held in the Trust Account shall be reinvested as provided in the Trust Agreement
on the business day immediately following the Consummation Date as set forth in the notice.

 

	 	Very
    truly yours,
	 	HEALTH SCIENCES ACQUISITIONS

                                                                     CORPORATION.

	 	By:	 
	 	 	Name:
	 	 	Title:

cc:       Chardan
Capital Markets LLC

 

     Exhibit A
Page 2

    

    

 

EXHIBIT
B

 

[Letterhead
of Company]

 

[Insert
date]

 

Continental
Stock Transfer

& Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

 

	 	Re:	Trust
    Account No. [●] Termination Letter

 

Dear
Sir or Madam:

 

Pursuant
to Section 1(i) of the Investment Management Trust Agreement between Health Sciences Acquisitions Corporation (the “Company”)
and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of [●], 2019 (the “Trust
Agreement”), this is to advise you that the Company has been unable to effect a business combination within the time frame
specified in the Company’s amended and restated certificate of incorporation, as described in the Company’s prospectus
relating to its initial public offering of securities. Capitalized terms used but not defined herein shall have the meanings set
forth in the Trust Agreement.

 

In
accordance with the terms of the Trust Agreement, we hereby authorize you to liquidate the Trust Account investments on [●],
and to transfer the total proceeds to the trust operating account at JPMorgan Chase Bank, N.A to await distribution to the Public
Shareholders. The Company has selected 20[●] as the effective date for the purpose of determining when the Public Shareholders
will be entitled to receive their share of the liquidation proceeds. It is acknowledged that no interest will be earned by the
Company on the liquidation proceeds while on deposit in the trust operating account. You agree to be the Paying Agent of record
and, in your separate capacity as Paying Agent, agree to distribute said funds directly to the Company’s Public Shareholders
in accordance with the terms of the Trust Agreement and the amended and restated certificate of incorporation of the Company.
Upon the distribution of all the funds in the trust account, your obligations under the Trust Agreement shall be terminated.

 

	 	Very
    truly yours,
	 	HEALTH SCIENCES ACQUISITIONS

                                                                     CORPORATION

	 	By:	 
	 	 	Name:
	 	 	Title:

cc:       Chardan
Capital Markets LLC

 

    Exhibit B
Page 1

    

    

 

EXHIBIT
C

 

[Letterhead
of Company]

 

[Insert
date]

 

Continental
Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

 

	 	Re:	Trust
    Account No. [●]

 

Dear
Sir or Madam:

 

Pursuant
to Section 1(j) of the Investment Management Trust Agreement between Health Sciences Acquisitions Corporation (the “Company”)
and Continental Stock Transfer & Trust Company, dated as of [●], 2019 (the “Trust Agreement”), the Company
hereby requests that you deliver to the Company $[●] of the interest income earned on the Property as of the date hereof.

 

The
Company needs such funds to pay its tax obligations. In accordance with the terms of the Trust Agreement, you are hereby directed
and authorized to transfer (via wire transfer) such funds promptly upon your receipt of this letter to the Company’s operating
account at:

 

[WIRE
INSTRUCTION INFORMATION]

 

	 	Very
    truly yours,
	 	HEALTH SCIENCES ACQUISITIONS

                                                                     CORPORATION

	 	By:	 
	 	 	Name:
	 	 	Title:

  cc: Chardan Capital Markets LLC

 

    Exhibit C
Page 1

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