Exhibit 10.1

FORM OF

INDEMNITY AGREEMENT

This Agreement is made and entered into as of                     , by and
between Pharmasset, Inc., a Delaware corporation (the “Company”), and [see
attached schedule] (“Indemnitee”):

WHEREAS, there is a general awareness that competent and experienced persons are
becoming more reluctant to serve as directors or officers of a publicly-held
corporation unless they are provided with adequate protection against claims and
actions against them for their activities on behalf of the corporation,
generally through insurance and indemnification; and

WHEREAS, the uncertainties in the interpretations of the statutes and
regulations, laws and public policies, relating to indemnification of corporate
directors and officers are such as to make adequate, reliable assessment of the
risks to which directors and officers of publicly-held corporations may be
exposed difficult, particularly in light of the proliferation of lawsuits
against directors and officers; and

WHEREAS, the Board of Directors of the Company, based upon its business
experience, has concluded that the continuation of present trends in litigation
against corporate directors and officers will inevitably make it more difficult
for the Company to retain directors and officers of the highest competence
committed to the active and effective direction and supervision of the business
and affairs of the Company and its subsidiaries and affiliates and the operation
of their facilities, and the Board of Directors deems such consequences to be so
detrimental to the best interests of the Company’s stockholders that it has
concluded that the Company should act to assure its directors and officers of
maximum protection against inordinate risks attendant on their positions in
order to ensure that the most capable persons otherwise available will be
attracted to such positions and, therefore, said directors have further
concluded that it is not only reasonable and prudent but necessary for the
Company to contractually obligate itself to indemnify to the fullest extent
permitted by applicable law its directors and officers and the directors and
officers of its affiliates and to assume, to the maximum extent permitted by
law, liability for expenses and liabilities that might be incurred by its
directors and officers in connection with claims lodged against them for their
decisions and actions as directors or officers; and

WHEREAS, Section 145 of the General Corporation Law of the State of Delaware,
under which law the Company is organized, empowers the Company to indemnify
persons serving as a director, officer, employee or agent of the Company or a
person who serves at the request of the Company as a director, officer, employee
or agent of another corporation, partnership, joint venture, trust or other
enterprise, and further specifies that the indemnification provided by said
section “shall not be deemed exclusive of any other rights to which those
seeking indemnification may be entitled under any bylaw, agreement, vote of
stockholders or disinterested directors or otherwise,” and further empowers the
Company to “purchase and maintain insurance” (on behalf of such persons)
“against any liability asserted against such person or incurred by such person
in any such capacity, or arising out of such person’s status as such, whether or
not the [Company] would have the power to indemnify such person against such
liability” under Section 145 of the General Corporation Law of the State of
Delaware; and

WHEREAS, the Company has investigated the type of insurance available, to insure
the directors and officers of the Company and its affiliates against expenses
(including attorneys’ fees), judgments, fines and amounts paid in settlement
actually and reasonably incurred by them in connection with any action, suit or
proceeding to which they are, or are threatened to be, made a party by reason of
their status and/or decisions or actions in such positions, has studied the
nature and extent of the coverage provided by such insurance and the cost
thereof to the Company, and has purchased such insurance to the extent
reasonably available; however, upon receiving such information, and
notwithstanding the purchase

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of such insurance when reasonably available, which insurance is subject to
certain significant exclusions and may cease to be available (even with such
exclusions), the directors of the Company have concluded that it would be in the
best interests of the stockholders for the Company to contract to indemnify such
persons as hereinafter provided; and

WHEREAS, the Company desires to have Indemnitee serve or continue to serve as a
director or officer of the Company and/or as a director, officer, employee,
trustee, partner, agent or fiduciary of such other corporations, partnerships,
joint ventures, employee benefit plans, trusts or other enterprises (herein
collectively called “Affiliates of the Company”) of which Indemnitee has been or
is serving, or will serve at the request of the Company, free from undue concern
for unpredictable, inappropriate or unreasonable claims for damages by reason of
Indemnitee’s being a director or officer of the Company or a director, officer,
employee, trustee, partner, agent or fiduciary of an Affiliate of the Company,
or by reason of Indemnitee’s decisions or actions on their behalf; and

WHEREAS, Indemnitee is willing to serve, or to continue to serve, or to take on
additional service for, the Company and/or the Affiliates of the Company in such
aforesaid capacities on the condition that Indemnitee be indemnified as provided
for herein;

NOW, THEREFORE, in consideration of the premises and the covenants contained
herein, the Company and Indemnitee do hereby covenant and agree as follows:

1. Services to the Company. Indemnitee will serve and/or continue to serve, at
the will of the Company or under separate contract, if any such contract exists,
as a director and/or officer of the Company and/or as a director, officer,
employee, trustee, partner, agent or fiduciary of an Affiliate of the Company
faithfully and to the best of Indemnitee’s ability so long as Indemnitee is duly
elected and qualified in accordance with the provisions of the bylaws or other
applicable constitutive documents thereof; provided that Indemnitee may at any
time and for any reason resign from such position (subject to any contractual
obligation which Indemnitee shall have assumed apart from this Agreement) and
provided further that neither the Company nor any Affiliate shall have any
obligation under this Agreement to continue to maintain Indemnitee in any such
position.

2. Indemnification.

(A) The Company shall indemnify Indemnitee to the fullest extent permitted, and
in the manner required, by applicable law as in effect as of the date hereof or
as such laws may, from time to time, be amended:

(a) if Indemnitee is a person who was or is a party or is threatened to be made
a party to any threatened, pending or completed action, suit or proceeding,
whether civil, criminal, administrative or investigative (other than an action
by or in the right of the Company) by reason of the fact that Indemnitee is or
was a director, officer, or employee of the Company, or is or was serving at the
request of the Company as a director, officer, employee, trustee, partner, agent
or fiduciary of an Affiliate of the Company, against expenses (including
attorneys’ fees), judgments, fines and amounts paid in settlement actually and
reasonably incurred by Indemnitee in connection with such action, suit or
proceeding if Indemnitee acted in good faith and in a manner Indemnitee
reasonably believed to be in or not opposed to the best interests of the
Company, and, with respect to any criminal action or proceeding, had no
reasonable cause to believe Indemnitee’s conduct was unlawful; and

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(b) if Indemnitee is a person who was or is a party or is threatened to be made
a party to any threatened, pending or completed action or suit by or in the
right of the Company to procure a judgment in its favor by reason of the fact
that Indemnitee is or was a director, officer or employee of the Company, or is
or was serving at the request of the Company as a director, officer, employee,
trustee, partner, agent or fiduciary of an Affiliate of the Company against
expenses (including attorneys’ fees) actually and reasonably incurred by
Indemnitee in connection with the defense or settlement of such action or suit
if Indemnitee acted in good faith and in a manner Indemnitee reasonably believed
to be in or not opposed to the best interests of the Company, except that no
such indemnification shall be made in respect of any claim, issue or matter as
to which such person shall have been adjudged to be liable to the Company unless
and only to the extent that the Court of Chancery of the State of Delaware or
the court in which such action or suit was brought shall determine upon
application that, despite the adjudication of liability but in view of all of
the circumstances of the case, Indemnitee is fairly and reasonably entitled to
indemnity for such expenses which the Court of Chancery of the State of Delaware
or such other court shall deem proper.

(B) Notwithstanding any other provisions of this Agreement, to the extent
Indemnitee has been successful on the merits or otherwise in defense of any
action, suit or proceeding referred to in subsection (A)(a) or (b) of this
Section 2, or in the defense of any claim, issue or matter therein, the Company
shall indemnify Indemnitee against expenses (including attorneys’ fees) actually
and reasonably incurred by Indemnitee in connection therewith.

(C) Notwithstanding anything to the contrary in the foregoing provisions of this
Section 2, Indemnitee shall not be entitled, as a matter of right, to
indemnification pursuant to this Section 2 (i) against and expenses incurred in
connection with any action, suit or proceeding commenced by Indemnitee against
the Company or any person who is or was a director or officer of the Company or
any of its affiliates, as defined in Rule 405 under the Securities Act of 1933
(“Securities Act Affiliate”), or any Affiliate of the Company, but such
indemnification may be provided by the Company in a specific case as
contemplated by Section 6 hereof, or (ii) in the event that Indemnitee has
served as a witness in cooperation with any party or entity that has threatened
or brought any action, suit or proceeding, whether civil, criminal,
administrative, or investigative, against the Company, any Securities Act
Affiliate, any Affiliate of the Company or any director, officer, employee,
trustee, partner, agent or fiduciary of any thereof, but such indemnification
may be provided by the Company in a specific case as contemplated by Section 6
hereof.

(D) The termination of any action, suit or proceeding by judgment, order,
settlement, conviction or upon a plea of nolo contendere or its equivalent,
shall not, of itself, create a presumption that the person did not act in good
faith and in a manner which the person reasonably believed to be in or not
opposed to the best interests of the Company, and, with respect to any criminal
action or proceeding, had reasonable cause to believe that Indemnitee’s conduct
was unlawful.

3. Partial Indemnification. If Indemnitee is only partially successful in the
defense, investigation, settlement or appeal of any action, suit, investigation
or proceeding described in Section 2 hereof and therefore not entitled hereunder
to indemnification by the Company for the total amount of the expenses
(including attorneys’ fees), judgments, penalties, fines and amounts paid in
settlement actually and reasonably incurred by Indemnitee, the Company shall
nevertheless indemnify Indemnitee to the extent Indemnitee has been partially
successful.

4. Determination of Entitlement to Indemnification.

(a) Upon written request by Indemnitee for indemnification pursuant to Section 2
hereof, the determination as to whether or not Indemnitee shall be entitled to
indemnification by reason of satisfying the applicable standard of conduct as
set forth in Section 2 shall be made (i) by the Board of

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Directors of the Company by a majority vote of a quorum consisting of
Disinterested Directors (as hereinafter defined) or, (ii) if such a quorum is
not obtainable or, even if obtainable, if the Board of Directors by the majority
vote of Disinterested Directors so directs, by Independent Counsel (as
hereinafter defined) in a written opinion to the Board of Directors, a copy of
which shall be delivered to Indemnitee, or (iii) by the stockholders. A
determination as to the entitlement of Indemnitee to indemnification pursuant to
Section 2 hereof shall be made as aforesaid not later than 60 days after the
Company shall have received a written request for indemnification. Indemnitee
shall cooperate with the Company in making its determination as aforesaid of
Indemnitee’s entitlement to indemnification, including providing to the Company
upon reasonable advance request any documentation or information reasonably
available to Indemnitee and material to such determination. Any expenses
(including attorneys’ fees) incurred by Indemnitee in so cooperating with the
Company shall be borne by the Company and the Company hereby indemnifies and
agrees to hold Indemnitee harmless therefrom irrespective of the outcome of the
determination as to Indemnitee’s satisfaction of the applicable standard of
conduct set forth in Section 2.

(b) The termination of any action, suit, investigation or proceeding described
in Section 2 hereof by judgment, order, settlement or conviction, or upon a plea
of nolo contendere or its equivalent, shall not, of itself, create a presumption
for the purposes of this Agreement that Indemnitee did not act in good faith and
in a manner that Indemnitee reasonably believed to be in or not opposed to the
best interests of the Company and, with respect to any criminal action or
proceeding, that Indemnitee had reasonable cause to believe that Indemnitee’s
conduct was unlawful.

(c) In making a determination pursuant to Section 4(a) hereof as to whether or
not Indemnitee satisfied the applicable standard of conduct set forth in
Section 2 hereof, the person or persons making such determination shall presume
that Indemnitee met the applicable standard of conduct set forth in
Section 2(A)(a), 2(A)(b) or 2(B), as the case may be, absent evidence to the
contrary and the absence or unavailability of evidence on the matter to be
decided, Indemnitee shall be entitled to the benefit of such presumption. The
Company shall have the burden of proof in the making of any determination
contrary to such presumption.

(d) For purposes of this Agreement:

(i) “Disinterested Director” with respect to any request by Indemnitee for
indemnification hereunder shall mean a director of the Company who is or was not
a party to or a subject of the action, suit, investigation or proceeding in
respect of which indemnification is being sought by Indemnitee.

(ii) “Independent Counsel” shall mean a law firm or a member of a law firm that
neither is nor in the past five years has been retained to represent in any
material matter the Company or any Securities Act Affiliate or Indemnitee or any
other party to the action, suit, investigation or proceeding giving rise to a
claim for indemnification hereunder and which, under applicable standards of
professional conduct then prevailing, would not have a conflict of interest in
representing either the Company or Indemnitee in an action to determine
Indemnitee’s right to indemnification under this Agreement and which is
reasonably acceptable to the Company and Indemnitee. For purposes hereof,
counsel shall not be deemed to regularly represent any government or
governmental entity which may have commenced any action, suit, investigation or
proceeding or be asserting any claim against Indemnitee solely by reason of
having regularly represented any department, commission, authority, subdivision
or public benefit corporation of or created by such government or governmental
entity which is a party to such action, suit, investigation or proceeding or
before which it is being prosecuted or which is making any such claim. The fees
and expenses of counsel in connection with making any determination

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contemplated hereunder shall be paid by the Company and, if requested by such
counsel, the Company shall give such counsel an appropriate written agreement
with respect to the payment of their fees and expenses and such other matters as
may be reasonably requested by counsel.

(e) In the event that a determination shall be made pursuant to (i) Section 4(a)
hereof that Indemnitee shall not be entitled to indemnification hereunder in
respect of any claim made by Indemnitee therefor by reason of Indemnitee’s
failing to satisfy the applicable standard set forth in Section 2 hereof, or
(ii) Section 5 hereof not to pay Indemnitee’s expenses, or in the event such
determination is not made, Indemnitee shall be entitled, at Indemnitee’s option,
to a final judicial determination or determination in arbitration of
Indemnitee’s entitlement to indemnification hereunder in respect of such claim
(including application of the standards set forth in Section 4(b) and (c) hereof
to the making of such determination) or Indemnitee’s entitlement to such an
advancement of expenses pursuant to Section 5 hereof. In the event Indemnitee
seeks a judicial determination, Indemnitee may initially seek such determination
by commencing an appropriate action in an appropriate court of the State of
Delaware or any other court of competent jurisdiction. In the event Indemnitee
seeks a determination in arbitration, such arbitration shall be conducted
pursuant to the rules of the American Arbitration Association and any such
determination shall be made within 60 days of following the filing of the demand
for arbitration. The Company shall not raise as a defense in any such judicial
determination or determination in arbitration of the entitlement of Indemnitee
to indemnification hereunder any prior determination made pursuant to this
Agreement of Indemnitee’s right to indemnification under this Agreement on any
other claim or advancement of expenses on such claim or any other claim, and for
all purposes of this Agreement any such judicial determination or determination
in arbitration shall be made de novo and without prejudice by reason of any such
prior determination. The Company further agrees to stipulate to any court or
arbitrator in which such action or arbitration shall have been commenced or
appealed that the Company agrees to be bound, for the purposes of such judicial
determination or determination in arbitration, by the presumption and burden of
proof provisions set forth in Section 4(c) hereof. If the court or arbitrator
shall determine that Indemnitee is entitled to indemnification or advancements
hereunder as to any expenses (including attorneys’ fees), judgments, penalties,
fines and amounts paid in settlement in respect of any claim, issue or matter
involved in the action, suit, investigation or proceeding in respect of which
indemnification is sought hereunder, the Company shall pay all expenses
(including attorneys’ fees) actually incurred by Indemnitee in connection with
such judicial determination or determination in arbitration (including, but not
limited to, any appellate proceedings).

(f) If, and to the extent it is finally determined hereunder that Indemnitee is
not entitled to indemnification, or is entitled only to partial indemnification,
Indemnitee agrees to reimburse the Company for all expenses advanced or prepaid
hereunder, or the proper proportion thereof, as the case may be, within 180 days
after receipt of an itemized written statement therefor from the Company, other
than the expenses of (i) obtaining the judicial determination referred to in
Sections 4(e) and 5 hereof, (ii) cooperating with the Company in making its
determination, as set forth in Section 4(a) hereof, or (iii) obtaining the
opinion of Independent Counsel pursuant to Section 4(a) hereof.

5. Advancement of Expenses. All reasonable expenses (including attorneys’ fees)
incurred by Indemnitee in preparing to serve or serving as a witness or in
investigating, defending, or appealing any threatened, pending or completed
civil or criminal action, suit or proceeding, administrative or investigative,
described in Section 2 hereof and not excluded by clause (i) or (ii) of
Section 2(d), or in connection with a judicial determination or determination in
arbitration pursuant to Section 4(e) or 5 hereof, shall be paid by the Company
(in advance of the final disposition of such action, suit or proceeding) at the
request of Indemnitee within 20 days after the receipt by the Company from
Indemnitee of a statement reasonably evidencing the expenses incurred by
Indemnitee in connection therewith, and averring that they do not relate to
matters described in the aforesaid clause (i) or (ii) of Section 2(d), together
with a written undertaking by or on behalf of Indemnitee to repay such amount if
it

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is ultimately determined that Indemnitee is not entitled to be indemnified
against such expenses by the Company as provided by this Agreement, the
Company’s Certificate of Incorporation or Bylaws, applicable law or otherwise.
Except when such advances relate to service as a witness only, the Board of
Directors shall make a determination in the specific case regarding Indemnitee’s
entitlement to such advancements of expenses within 14 days after receipt of the
aforesaid statement and undertaking. In the event the Board of Directors
determines not to so pay Indemnitee’s expenses, Indemnitee shall be entitled, at
Indemnitee’s option, to a judicial determination or determination in arbitration
of Indemnitee’s right to such advancement of expenses as set forth in
Section 4(e) hereof.

6. Other Rights to Indemnification. The indemnification and advancement of
expenses (including attorneys’ fees) provided by this Agreement shall not be
deemed exclusive of any other rights to which Indemnitee may now or in the
future be entitled under any provision of law, the Certificate of Incorporation
or any Bylaw of the Company or any other agreement or any vote of stockholders
or directors or otherwise, whether as to action in Indemnitee’s official
capacity or in another capacity while occupying any of the positions or having
any of the relationships referred to in Section 2 of this Agreement. The Company
shall not, however, be liable under this Agreement to make any payment of
amounts otherwise indemnifiable hereunder (or for which advancement is provided
hereunder) if and to the extent that Indemnitee has otherwise actually received
such payment under any insurance policy, contract, agreement or otherwise.

7. Merger or Consolidation of the Company.

(a) In the event that the Company or a Securities Act Affiliate of the Company
shall be a constituent corporation in a consolidation or a merger, whether or
not the Company or such Securities Act Affiliate of the Company, as the case may
be, is the resulting or surviving corporation, Indemnitee shall stand in the
same position under this Agreement with respect to the resulting or surviving
corporation as Indemnitee would have stood with respect to the Company if its
separate existence had continued or with respect to the Securities Act Affiliate
of the Company if such affiliation had continued.

(b) In addition to any other provision of this Agreement, the Company hereby
covenants and agrees that it will not consummate any consolidation, merger or
other business combination nor will it transfer 50% or more of its assets (in
one or a series of related transactions) unless the ultimate parent of the other
party to such transaction, whether or not in the event of a business combination
the Company is the surviving entity, shall have executed an agreement stating
that such party (i) shall use its best efforts to maintain any director and
officer insurance policy in an amount and with coverage no less favorable than
that which exists as of the date hereof, or the closest practicable equivalent
thereto; (ii) shall indemnify Indemnitee, except in the circumstances set forth
in Sections 2(d)(i) and (ii) of this Agreement, against any expenses (including
attorneys’ fees), judgments, penalties, fines and amounts paid in settlement
actually and reasonably incurred by Indemnitee in connection with any suit or
proceeding, whether civil, criminal, administrative or investigative in nature,
to which Indemnitee was or is made a party or witness or is threatened to be
made a party or witness, by reason of the fact that Indemnitee is or was a
director, officer or employee of the Company or is or was serving at the request
of the Company as a director, officer, employee, trustee, partner, agent or
fiduciary of an Affiliate of the Company, or by reason of anything done or not
done by Indemnitee in such capacity; and (iii) shall pay, except in the
circumstances set forth in Sections 2(d)(i) and (ii) (in advance of the final
disposition of the action, suit or proceeding) all reasonable expenses
(including attorneys’ fees) incurred by Indemnitee in preparing to serve or
serving as a witness or in investigating, defending or appealing any threatened,
pending or completed civil or criminal action, suit or proceeding,
administrative or investigative, in each case within 20 days of the submission
by Indemnitee of a statement requesting the payment of such expenses and
reasonably evidencing the expenses incurred by Indemnitee in connection
therewith.

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8. Attorneys’ Fees. In the event that Indemnitee is subject to or intervenes in
any legal action in which the validity or enforceability of this Agreement is at
issue or institutes any legal action to enforce Indemnitee’s rights under, or to
recover damages for breach of, this Agreement (other than an action referred to
in Section 4(e) hereof), Indemnitee, if Indemnitee prevails in whole or in part
in such legal action, shall be entitled to recover from the Company and shall be
indemnified by the Company against, any actual expenses for attorneys’ fees and
disbursements reasonably incurred by Indemnitee.

9. Duration of Agreement; Successors and Assigns.

(a) All agreements and obligations of the Company contained herein shall
continue during the period Indemnitee is a director, officer, employee or other
agent of the Company (or is or was serving at the request of the Company as a
director, officer, employee, trustee, partner, agent or fiduciary of any
Affiliate of the Company) and shall continue thereafter so long as Indemnitee
shall be subject to any possible claim or threatened, pending or completed
action, suit or proceeding, whether civil, criminal, arbitrational,
administrative or investigative, by reason of the fact that Indemnitee was
serving in the capacity referred to herein.

(b) This Agreement shall be binding upon the Company and its successors and
assigns and shall inure to the benefit of Indemnitee and Indemnitee’s spouse,
heirs, devisees, executors and administrators.

10. Severability. If any provision or provisions of this Agreement shall be held
to be invalid, illegal or unenforceable for any reason whatsoever (i) the
validity, legality and enforceability of the remaining provisions of this
Agreement (including, without limitation, all portions of any paragraphs of this
Agreement containing any such provision held to be invalid, illegal or
unenforceable, that are not themselves invalid, illegal or unenforceable) shall
not in any way be affected or impaired thereby, and (ii) to the fullest extent
possible, the provisions of this Agreement (including, without limitation, all
portions of any paragraph of this Agreement containing any such provision held
to be invalid, illegal or unenforceable that are not themselves invalid, illegal
or unenforceable) shall be construed so as to give effect to the intent
manifested by the provision held invalid, illegal or unenforceable.

11. Identical Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall for all purposes be deemed to be an original
but all of which together shall constitute one and the same Agreement. Only one
such counterpart signed by the party against whom enforceability is sought needs
to be produced to evidence the existence of this Agreement.

12. Headings. The headings of the paragraphs of this Agreement are inserted for
convenience only and shall not be deemed to constitute part of this Agreement or
to affect the construction thereof.

13. Use of Certain Terms. As used in this Agreement, the words “herein,”
“hereof,” and “hereunder” and other words of similar import refer to this
Agreement as a whole and not to any particular Section, paragraph, subparagraph
or other subdivision. For purposes of this Agreement, references to “fines”
shall include any excise taxes assessed on Indemnitee with respect to any
employee benefit plan; and references to “serving at the request of the Company”
shall include any service as a director, officer, employee, trustee, partner,
agent or fiduciary of the Company that imposes duties on, or involves services
by, Indemnitee with respect to any employee benefit plan, its participants or
beneficiaries; and, if Indemnitee acted in good faith and in a manner Indemnitee
reasonably believed to be in the interest of the participants and beneficiaries
of an employee benefit plan, Indemnitee shall be deemed to have acted in a
manner “not opposed to the best interests of the Company” as referred to in this
Agreement.

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14. Modification and Waiver. No supplement, modification or amendment of this
Agreement shall be binding unless executed in writing by both of the parties
hereto. No waiver of any of the provisions of this Agreement shall be deemed or
shall constitute a waiver of any other provisions hereof (whether or not
similar) nor shall such waiver constitute a continuing waiver.

15. Notice by Indemnitee. Indemnitee agrees to promptly notify the Company in
writing upon being served with any summons, citation, subpoena, complaint,
indictment, notice, information or other document relating to any matter that
may be subject to indemnification covered hereunder, either civil, criminal or
investigative.

16. Notices. All notices, requests, demands and other communications hereunder
shall be in writing and shall be deemed to have been duly given if (i) delivered
by hand and receipted for by the party to whom said notice or other
communication shall have been directed or (ii) mailed by certified or registered
mail with postage prepaid, on the third business day after the date on which it
is so mailed:

(a) If to Indemnitee, at the address indicated on the signature page hereof.

(b) If to the Company, to:

Pharmasset, Inc.

303-A College Road East

Princeton, NJ 08540

Attn: Secretary

or to such other address as either may subsequently furnish to the other in
writing.

17. Governing Law. The parties hereto agree that this Agreement shall be
governed by, and construed and enforced in accordance with, the laws of the
State of Delaware, without regard to the conflicts of law principles thereof.

18. Subrogation. In the event of any payment under this Agreement, the Company
shall be subrogated to the extent of such payment to all the rights of recovery
of Indemnitee, who shall execute all documents required and shall do all acts
that may be necessary to secure such rights and to enable the Company
effectively to bring suit to enforce such rights.

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IN WITNESS WHEREOF, the parties have executed this Agreement on the day and year
first above written.

 

PHARMASSET, INC.       INDEMNITEE          [See attached schedule] By:   

 

     

 

Name:          Name: Title:         

 

         (street address)         

 

         (city, state)

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SCHEDULE OF DIFFERENCES

Other than the identification of the Indemnitee, each Agreement executed with
the directors and executive officers listed below is substantially the same as
this form and as each other.

 

Name

  

Position

  

Date Entered Into

P. Schaefer Price

   President and Chief Executive Officer    April 25, 2007

Kurt Leutzinger

   Chief Financial Officer    April 25, 2007

Michael Rogers

   Chief Development Officer    November 1, 2007

Michelle Berrey, M.D.

   Chief Medical Officer    April 25, 2007

Michael J. Otto, Ph.D.

   Chief Scientific Officer    April 25, 2007

G. Steven Burrill

   Chairman of the Board of Directors    April 25, 2007

William J. Carney

   Director    April 25, 2007

Herbert J. Conrad

   Director    March 25, 2008

Elliot F. Hahn

   Director    April 25, 2007

Michael K. Inouye

   Director    April 25, 2007

Fredric D. Price

   Director    April 25, 2007

Robert F. Williamson III

   Director    April 25, 2007