Document:

Form of Subordination Agreement

 EXHIBIT 10.8 
 SUBORDINATION AGREEMENT 
 This Subordination Agreement (this “Agreement”) is entered
into as of the 19th day of September, 2008, by and among Accentia Biopharmaceuticals, Inc., a Florida corporation (the “Subordinated Lender”), and LV Administrative Services, Inc., a Delaware corporation, as agent (in such
capacity, “Agent”) for itself and the Purchasers from time to time party to the Note Purchase Agreements referred to below (together with their affiliates, endorsees, transferees and assigns, each, a “Lender” and,
together with the Agent, the “Senior Lenders”). Unless otherwise defined herein, capitalized terms used herein shall have the meaning provided such terms in the Note Purchase Agreements referred to below. 
 BACKGROUND 
 WHEREAS, it is a condition to
each Lender’s agreement to continue to make investments in Biovest International, Inc., a Delaware corporation (the “Company”) pursuant to, and in accordance with, (i) that certain Note and Warrant Purchase Agreement dated
as of March 31, 2006 (as amended, supplemented, restated or modified from time to time, the “March 2006 Laurus Purchase Agreement”) by and between Laurus Master Fund, Ltd. (“Laurus”) and the Company,
(ii) the Related Agreements referred to in the March 2006 Laurus Purchase Agreement, (iii) that certain Note Purchase Agreement dated as of October 30, 2007 (as amended, supplemented, restated or modified from time to time, the
“October 2007 Valens US Purchase Agreement”) by and between Valens U.S. SPV I, LLC (“Valens US”) and the Company, (iv) the Related Agreements referred to in the October 2007 Valens US Purchase Agreement,
(v) that certain Note Purchase Agreement dated as of October 30, 2007 (as amended, supplemented, restated or modified from time to time, the “October 2007 Valens Offshore Purchase Agreement”) by and between Valens Offshore
SPV II, Corp. (“Valens Offshore II”) and the Company, (vi) the Related Agreements referred to in the October 2007 Valens Offshore Purchase Agreement, (vii) that certain Note Purchase Agreement dated as of December 10,
2007 (as amended, supplemented, restated or modified from time to time, the “December 2007 Valens US Purchase Agreement”) by and between Valens US and the Company, (viii) the Related Agreements referred to in the December 2007
Valens US Purchase Agreement, (ix) that certain Note Purchase Agreement dated as of December 10, 2007 (as amended, supplemented, restated or modified from time to time, the “December 2007 Valens Offshore Purchase
Agreement”; and together with the March 2006 Laurus Purchase Agreement, the October 2007 Valens US Purchase Agreement, the October 2007 Valens Offshore Purchase Agreement, the December 2007 Valens US Purchase Agreement and all other
securities purchase and/or note purchase agreements entered into by Company in favor of one or more Senior Lenders, collectively, the “Note Purchase Agreements”) by and between Valens Offshore II and the Company, and (x) the
Related Agreements referred to in the December 2007 Valens Offshore Purchase Agreement, that the Subordinated Lender enter into this Agreement. Please be advised that certain or all of the Note Purchase Agreements and Related Agreements have been
assigned by Laurus, Valens US and/or Valens Offshore II to various subsidiaries and/or affiliates of Laurus, Valens US and/or Valens Offshore II. 

 WHEREAS, the Subordinated Lender has made or will make loans to the Company. 
 NOW, THEREFORE, the Subordinated Lender and the Senior Lenders and the Agent on behalf of Senior Lenders hereby agree as follows: 
 TERMS 
 1. All obligations of the Company
and/or any of its Subsidiaries to any Senior Lender, howsoever created, arising or evidenced, whether direct or indirect, absolute or contingent or now or hereafter existing, or due or to become due are referred to as “Senior Liabilities”.
Any and all loans made by the Subordinated Lender to the Company and/or any of its Subsidiaries, together with all other obligations (whether monetary or otherwise) of the Company and/or any of its Subsidiaries to the Subordinated Lender (in each
case, including any interest, fees or penalties related thereto), howsoever created, arising or evidenced, whether direct or indirect, absolute or contingent or now or hereafter existing, or due or to become due are referred to as “Junior
Liabilities”. It is expressly understood and agreed that the term “Senior Liabilities”, as used in this Agreement, shall include, without limitation, any and all interest, fees and penalties accruing on any of the Senior Liabilities
after the commencement of any proceedings referred to in paragraph 4 of this Agreement, notwithstanding any provision or rule of law which might restrict the rights of any Senior Lender, as against the Company, its Subsidiaries or anyone else, to
collect such interest, fees or penalties, as the case may be. 
 2. Except as expressly otherwise provided in this Agreement or as the Agent
on its own behalf and on behalf of the Lenders may otherwise expressly consent in writing, the payment of the Junior Liabilities shall be postponed and subordinated in right of payment and priority to the payment in full of all Senior Liabilities.
Furthermore, whether directly or indirectly, no payments or other distributions whatsoever in respect of any Junior Liabilities shall be made (whether at stated maturity, by acceleration or otherwise), nor shall any property or assets of the Company
or any of its Subsidiaries be applied to the purchase or other acquisition or retirement of any Junior Liability until such time as the Senior Liabilities have been indefeasibly paid in full. 
 3. The Subordinated Lender hereby subordinates all claims and security interests it may have against, or with respect to, any of the assets of the
Company and/or any of its Subsidiaries (the “Subordinated Lender Liens”), to the security interests granted by the Company and/or any of its Subsidiaries to each Senior Lender in respect of the Senior Liabilities. No Senior Lender
shall owe any duty to the Subordinated Lender as a result of or in connection with any Subordinated Lender Liens, including, without limitation, any marshalling of assets or protection of the rights or interests of the Subordinated Lender. The
Agent, on its own behalf and on behalf of the Lenders, shall have the exclusive right to manage, perform and enforce the underlying terms of the Note Purchase Agreements, the Related Agreements and each other document, instrument and agreement
executed from time to time in connection therewith (collectively, the “Security Agreements”) relating to the assets of the Company and its Subsidiaries and to exercise and enforce its rights according to its discretion. The
Subordinated Lender waives all rights to affect the method or challenge the appropriateness of any action taken by any Senior Lenders in connection with any Senior Lender’s enforcement of its rights under 

  

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the Security Agreements. Only the Agent, on its own behalf and on behalf of the Lenders, shall have the right to restrict, permit, approve or disapprove the
sale, transfer or other disposition of the assets of the Company or any of its Subsidiaries. As between each Senior Lender and the Subordinated Lender, the terms of this Agreement shall govern even if all or part of any Senior Lender’s liens
are avoided, disallowed, set aside or otherwise invalidated. 
 4. In the event of any dissolution, winding up, liquidation, readjustment,
reorganization or other similar proceedings relating to the Company and/or any of its Subsidiaries or to its creditors, as such, or to its property (whether voluntary or involuntary, partial or complete, and whether in bankruptcy, insolvency or
receivership, or upon an assignment for the benefit of creditors, or any other marshalling of the assets and liabilities of the Company and/or any of its Subsidiaries, or any sale of all or substantially all of the assets of the Company and/or any
of its Subsidiaries, or otherwise), the Senior Liabilities shall first be irrevocably paid in full before the Subordinated Lender shall be entitled to receive and to retain any payment, distribution, other rights or benefits in respect of any Junior
Liability. In order to enable each Senior Lender to enforce its rights hereunder in any such action or proceeding, each Senior Lender is hereby irrevocably authorized and empowered in its discretion as attorney in fact for the Subordinated Lender to
make and present for and on behalf of the Subordinated Lender such proofs of claims against the Company and/or its Subsidiaries as the Agent may deem expedient or proper and to vote such proofs of claims in any such proceeding and to receive and
collect any and all dividends or other payments or disbursements made thereon in whatever form the same may be paid or issued and to apply same on account of any the Senior Liabilities. In the event, prior to indefeasible payment in full of the
Senior Liabilities, the Subordinated Lender shall receive any payment in respect of the Junior Liabilities and/or in connection with the enforcement of the Subordinated Lender’s rights and remedies against the Company and/or any of its
Subsidiaries, whether arising in connection with the Junior Liabilities or otherwise, then the Subordinated Lender shall forthwith deliver, or cause to be delivered, the same to the Agent in precisely the form held by the Subordinated Lender (except
for any necessary endorsement) and until so delivered the same shall be held in trust by the Subordinated Lender as the property of the Senior Lender. 
 5. The Subordinated Lender will mark its/his books and records so as to clearly indicate that its/his respective Junior Liabilities are subordinated in accordance with the terms of this Agreement. The Subordinated
Lender will execute such further documents or instruments and take such further action as the Agent may reasonably request from time to time to carry out the intent of this Agreement. 
 6. The Subordinated Lender hereby waives all diligence in collection or protection of or realization upon the Senior Liabilities or any security for the
Senior Liabilities. 
 7. The Subordinated Lender will not, without the prior written consent of the Agent: (a) attempt to enforce or
collect any Junior Liability or any rights in respect of any Junior Liability; or (b) commence, or join with any other creditor in commencing, any bankruptcy, reorganization or insolvency proceedings with respect to the Company and/or any of
its Subsidiaries. 
  

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 8. The Agent, on its own behalf and on behalf of the Lenders, may, from time to time, at its sole
discretion and without notice to the Subordinated Lender, take any or all of the following actions: (a) retain or obtain a security interest in any property to secure any of the Senior Liabilities; (b) retain or obtain the primary or
secondary obligation of any other obligor or obligors with respect to any of the Senior Liabilities; (c) extend or renew for one or more periods (whether or not longer than the original period), alter, increase or exchange any of the Senior
Liabilities, or release or compromise any obligation of any nature of any obligor with respect to any of the Senior Liabilities; and (d) release its security interest in, or surrender, release or permit any substitution or exchange for, all or
any part of any property securing any of the Senior Liabilities, or extend or renew for one or more periods (whether or not longer than the original period) or release, compromise, alter or exchange any obligations of any nature of any obligor with
respect to any such property. 
 9. The Agent, on its own behalf and on behalf of the Lenders, may, from time to time, whether before or
after any discontinuance of this Agreement, without notice to the Subordinated Lender, assign or transfer any or all of the Senior Liabilities or any interest in the Senior Liabilities; and, notwithstanding any such assignment or transfer or any
subsequent assignment or transfer of the Senior Liabilities, such Senior Liabilities shall be and remain Senior Liabilities for the purposes of this Agreement, and every immediate and successive assignee or transferee of any of the Senior
Liabilities or of any interest in the Senior Liabilities shall, to the extent of the interest of such assignee or transferee in the Senior Liabilities, be entitled to the benefits of this Agreement to the same extent as if such assignee or
transferee were a Senior Lender, as applicable; provided, however, that, unless the Agent on its own behalf and on behalf of the Lenders, shall otherwise consent in writing, the Senior Lenders shall have an unimpaired right, prior and superior to
that of any such assignee or transferee, to enforce this Agreement, for the benefit of the Senior Lenders, as to those of the Senior Liabilities which the Senior Lenders have not assigned or transferred. 
 10. The Senior Lenders shall not be prejudiced in their rights under this Agreement by any act or failure to act of the Subordinated Lender, or any
noncompliance of the Subordinated Lender with any agreement or obligation, regardless of any knowledge thereof which any Senior Lender may have or with which any Senior Lender may be charged; and no action of any Senior Lender permitted under this
Agreement shall in any way affect or impair the rights of any other Senior Lender and the obligations of the Subordinated Lender under this Agreement. 
 11. No delay on the part of any Senior Lender in the exercise of any right or remedy shall operate as a waiver of such right or remedy, and no single or partial exercise by the Senior Lenders of any right or remedy
shall preclude other or further exercise of such right or remedy or the exercise of any other right or remedy; nor shall any modification or waiver of any of the provisions of this Agreement be binding upon any Senior Lender except as expressly set
forth in a writing duly signed and delivered by the Agent on it own behalf and on behalf of the Senior Lenders. For the purposes of this Agreement, Senior Liabilities shall have the meaning set forth in Section 1 above, notwithstanding any
right or power of the Subordinated Lender or anyone else to assert any claim or defense as to the invalidity or unenforceability of any such obligation, and no such claim or defense shall affect or impair the agreements and obligations of the
Subordinated Lender under this Agreement. 
  

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 12. This Agreement shall continue in full force and effect after the filing of any petition
(“Petition”) by or against the Company and/or any of its Subsidiaries under the United States Bankruptcy Code (the “Code”) and all converted or succeeding cases in respect thereof. All references herein to the
Company and/or Subsidiary shall be deemed to apply to the Company and such Subsidiary as debtor-in-possession and to a trustee for the Company and/or such Subsidiary. If the Company or any of its Subsidiaries shall become subject to a proceeding
under the Code, and if the Senior Lenders shall desire to permit the use of cash collateral or to permit or provide post-Petition financing from any Senior Lender (or an affiliate or a third party satisfactory to the Senior Lenders) to the Company
or any such Subsidiary under the Code, the Subordinated Lender agrees as follows: (1) adequate notice to the Subordinated Lender shall be deemed to have been provided for such consent or post-Petition financing if the Subordinated Lender
receives notice thereof three (3) business days (or such shorter notice as is given to the Senior Lenders) prior to the earlier of (a) any hearing on a request to approve such post-petition financing or (b) the date of entry of an
order approving same; and (2) no objection will be raised by the Subordinated Lender to any such use of cash collateral or such post-Petition financing from any Senior Lender (or an affiliate of the Senior Lender). 
 13. This Agreement shall be binding upon the Subordinated Lender and upon the heirs, legal representatives, successors and assigns of the Subordinated
Lender and the successors and assigns of the Subordinated Lender. This Agreement may be executed in one or more counterparts, each of which shall be deemed an original and all of which together shall be deemed to constitute one agreement. It is
understood and agreed that if facsimile copies of this Agreement bearing facsimile signatures are exchanged between the parties hereto, such copies shall in all respects have the same weight, force and legal effect and shall be fully as valid,
binding, and enforceable as if such signed facsimile copies were original documents bearing original signature. 
 14. So long as any of the
Senior Liabilities shall remain outstanding, no Subordinated Lender shall permit any of the documents, instruments and/or agreements entered into in connection with the Junior Liabilities to be amended, modified or otherwise supplemented without the
prior written consent of the Agent. 
 15. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED, INTERPRETED AND ENFORCED ACCORDING TO, THE
LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF LAWS PROVISIONS THEREOF AND SHALL BE BINDING UPON THE PARTIES HERETO AND THEIR RESPECTIVE SUCCESSORS AND ASSIGNS. ANY ACTION BROUGHT CONCERNING THE TRANSACTIONS CONTEMPLATED
BY THIS AGREEMENT SHALL BE BROUGHT ONLY IN THE STATE COURTS OF NEW YORK OR IN THE FEDERAL COURTS LOCATED IN THE STATE OF NEW YORK; PROVIDED, HOWEVER, THAT THE SENIOR LENDER MAY CHOOSE TO WAIVE THIS PROVISION AND BRING AN ACTION OUTSIDE THE STATE OF
NEW YORK. The individuals executing this Agreement on behalf of the Subordinated Lender agree to submit to the jurisdiction of such courts and waive 

  

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trial by jury. The prevailing party shall be entitled to recover from the other party its reasonable attorneys’ fees and costs. Wherever possible each
provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this Agreement shall be prohibited by or invalid under such law, such provision shall be ineffective to the
extent of such prohibition or invalidity, without invalidating the remainder of such provision or the remaining provisions of this Agreement. 
 [signature page follows] 
  

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 IN WITNESS WHEREOF, this Agreement has been made and delivered this 19th day of September, 2008.

  

			
	ACCENTIA BIOPHARMACEUTICALS, INC.
		
	By:	 	  

	Name:	 	Francis E. O’Donnell, Jr., M.D.
	Title:	 	Chairman & CEO
	
	VALENS OFFSHORE SPV I, LTD.
		
	By:	 	Valens Capital Management, LLC, its
		 	investment manager
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	VALENS OFFSHORE SPV II, CORP.
		
	By:	 	Valens Capital Management, LLC, its
		 	investment manager
		
	By:	 	  

	Name:	 	
	Title:	 	

			
	PSOURCE STRUCTURED DEBT LIMITED
		
	By:	 	Laurus Capital Management, LLC, its
		 	investment manager
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	LV ADMINISTRATIVE SERVICES, INC.,
	individually and as Agent
		
	By:	 	  

	Name:	 	
	Title:	 	

 Acknowledged and Agreed to by: 
  

			
	BIOVEST INTERNATIONAL, INC.
		
	By:	 	  

	Name:	 	Steven Arikian, M.D.
	Title:	 	Chairman & CEO

  

 8Form of Subordination Agreement

 EXHIBIT 10.9 
 SUBORDINATION AGREEMENT 
 This Subordination Agreement (this “Agreement”) is entered
into as of the 19th day of September, 2008, by and among each of the parties which have executed this Agreement on the signature pages below as subordinated lenders (the “Subordinated Lenders” and each, a “Subordinated
Lender”), and LV Administrative Services, Inc., a Delaware corporation, as agent (in such capacity, “Agent”) for itself and the Purchasers from time to time party to the Note Purchase Agreements referred to below (together
with their affiliates, endorsees, transferees and assigns, each, a “Lender” and, together with the Agent, the “Senior Lenders”). Unless otherwise defined herein, capitalized terms used herein shall have the meaning
provided such terms in the Note Purchase Agreements referred to below. 
 BACKGROUND 
 WHEREAS, it is a condition to each Lender’s agreement to continue to make investments in Biovest International, Inc., a Delaware corporation (the
“Company”) pursuant to, and in accordance with, (i) that certain Note and Warrant Purchase Agreement dated as of March 31, 2006 (as amended, supplemented, restated or modified from time to time, the “March 2006
Laurus Purchase Agreement”) by and between Laurus Master Fund, Ltd. (“Laurus”) and the Company, (ii) the Related Agreements referred to in the March 2006 Laurus Purchase Agreement, (iii) that certain Note Purchase
Agreement dated as of October 30, 2007 (as amended, supplemented, restated or modified from time to time, the “October 2007 Valens US Purchase Agreement”) by and between Valens U.S. SPV I, LLC (“Valens
US”) and the Company, (iv) the Related Agreements referred to in the October 2007 Valens US Purchase Agreement, (v) that certain Note Purchase Agreement dated as of October 30, 2007 (as amended, supplemented, restated or
modified from time to time, the “October 2007 Valens Offshore Purchase Agreement”) by and between Valens Offshore SPV II, Corp. (“Valens Offshore II”) and the Company, (vi) the Related Agreements referred to in
the October 2007 Valens Offshore Purchase Agreement, (vii) that certain Note Purchase Agreement dated as of December 10, 2007 (as amended, supplemented, restated or modified from time to time, the “December 2007 Valens US Purchase
Agreement”) by and between Valens US and the Company, (viii) the Related Agreements referred to in the December 2007 Valens US Purchase Agreement, (ix) that certain Note Purchase Agreement dated as of December 10, 2007 (as
amended, supplemented, restated or modified from time to time, the “December 2007 Valens Offshore Purchase Agreement”; and together with the March 2006 Laurus Purchase Agreement, the October 2007 Valens US Purchase Agreement, the
October 2007 Valens Offshore Purchase Agreement, the December 2007 Valens US Purchase Agreement and all other securities purchase and/or note purchase agreements entered into by Company in favor of one or more Senior Lenders, collectively, the
“Note Purchase Agreements”) by and between Valens Offshore II and the Company, and (x) the Related Agreements referred to in the December 2007 Valens Offshore Purchase Agreement, that the Subordinated Lenders enter into this
Agreement. Please be advised that certain or all of the Note Purchase Agreements and Related Agreements have been assigned by Laurus, Valens US and/or Valens Offshore II to various subsidiaries and/or affiliates of Laurus, Valens US and/or Valens
Offshore II. 
 WHEREAS, the Subordinated Lenders have made or will make loans to the Company. 

 NOW, THEREFORE, each Subordinated Lender and the Senior Lenders and the Agent on behalf of Senior Lenders
hereby agree as follows: 
 TERMS 
 1. All obligations of the Company and/or any of its Subsidiaries to any Senior Lender, howsoever created, arising or evidenced, whether direct or indirect, absolute or contingent or now or hereafter existing, or due or to become due, other
than obligations to any Senior Lender created, arising or evidenced by the Subordinated Lender Documents, are referred to as “Senior Liabilities”. Any and all loans made by the Subordinated Lenders to the Company and/or any of its
Subsidiaries, together with all other obligations (whether monetary or otherwise) of the Company and/or any of its Subsidiaries to any Subordinated Lender (in each case, including any interest, fees or penalties related thereto), created, arising or
evidenced, under and in connection with (i) that certain Securities Purchase Agreement, dated as of the date hereof (as amended, modified or supplemented from time to time, the “Junior Purchase Agreement”), among the Company
and Purchasers under and as defined in the Junior Purchase Agreement (the “Junior Purchasers”), (ii) those certain Secured Convertible Debentures dated as of the date hereof by the Company in favor of each of the Junior
Purchasers in the aggregate principal amount of $5,000,000 (the “Junior Notes”), and (iii) that certain Security Agreement dated as of the date hereof among the Company and the Junior Purchasers (the “Junior Security
Agreement”; and together with the Junior Purchase Agreement, the Junior Notes, the Transaction Documents (as defined in the Junior Purchase Agreement), and all other documents, instruments and agreements entered into in connection with the
transactions contemplated hereby and thereby, collectively, the “Subordinated Lender Documents”), are referred to as “Junior Liabilities”. It is expressly understood and agreed that the term “Senior
Liabilities”, as used in this Agreement, shall include, without limitation, any and all interest, fees and penalties accruing on any of the Senior Liabilities after the commencement of any proceedings referred to in paragraph 4 of this
Agreement, notwithstanding any provision or rule of law which might restrict the rights of any Senior Lender, as against the Company, its Subsidiaries or anyone else, to collect such interest, fees or penalties, as the case may be. 
 2. Except as expressly otherwise provided in this Agreement or as the Agent on its own behalf and on behalf of the Lenders may otherwise expressly
consent in writing, the payment of the Junior Liabilities shall be postponed and subordinated in right of payment and priority to the payment in full of all Senior Liabilities. Furthermore, whether directly or indirectly, no payments or other
distributions whatsoever in respect of any Junior Liabilities shall be made (whether at stated maturity, by acceleration or otherwise), nor shall any property or assets of the Company or any of its Subsidiaries be applied to the purchase or other
acquisition or retirement of any Junior Liability until such time as the Senior Liabilities have been indefeasibly paid in full. Notwithstanding anything to the contrary contained in this paragraph 2 or elsewhere in this Agreement, the Company may
make regularly scheduled principal and interest payments, as the case may be, to the Subordinated Lenders with respect to the Junior Liabilities, so long as (i) no Event of Default (as defined in the Note Purchase Agreements or any Related
Agreement) has occurred and is continuing at the time of any such payment or after giving effect to such payment, (ii) the Company shall have provided to Agent written evidence, in form and substance satisfactory to Agent, that the Company has,
on the date of any such payment, after giving effect to such payment, cash or cash equivalents on hand in an amount 

  

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equal to not less than three (3) months scheduled principal and interest payments to be due and payable to the Senior Lenders over the immediately
following three (3) month period in respect of the Senior Liabilities, as determined by Agent in its sole discretion, and (iii) the amount of such regularly scheduled principal payments and the rate of interest, in each case, with respect
to the Junior Liabilities is not increased from that in effect on the date hereof. 
 3. Each Subordinated Lender hereby subordinates all
claims and security interests it may have against, or with respect to, any of the assets of the Company and/or any of its Subsidiaries (the “Subordinated Lender Liens”), to the security interests granted by the Company and/or any of
its Subsidiaries to each Senior Lender in respect of the Senior Liabilities. No Senior Lender shall owe any duty to any Subordinated Lender as a result of or in connection with any Subordinated Lender Liens, including, without limitation, any
marshalling of assets or protection of the rights or interests of any Subordinated Lender. The Agent, on its own behalf and on behalf of the Lenders, shall have the exclusive right to manage, perform and enforce the underlying terms of the Note
Purchase Agreements, the Related Agreements and each other document, instrument and agreement executed from time to time in connection therewith (collectively, the “Security Agreements”) relating to the assets of the Company and its
Subsidiaries and to exercise and enforce its rights according to its discretion. Each Subordinated Lender waives all rights to affect the method or challenge the appropriateness of any action taken by any Senior Lenders in connection with any Senior
Lender’s enforcement of its rights under the Security Agreements. Only the Agent, on its own behalf and on behalf of the Lenders, shall have the right to restrict, permit, approve or disapprove the sale, transfer or other disposition of the
assets of the Company or any of its Subsidiaries. As between each Senior Lender and each Subordinated Lender, the terms of this Agreement shall govern even if all or part of any Senior Lender’s liens are avoided, disallowed, set aside or
otherwise invalidated. 
 4. In the event of any dissolution, winding up, liquidation, readjustment, reorganization or other similar
proceedings relating to the Company and/or any of its Subsidiaries or to its creditors, as such, or to its property (whether voluntary or involuntary, partial or complete, and whether in bankruptcy, insolvency or receivership, or upon an assignment
for the benefit of creditors, or any other marshalling of the assets and liabilities of the Company and/or any of its Subsidiaries, or any sale of all or substantially all of the assets of the Company and/or any of its Subsidiaries, or otherwise),
the Senior Liabilities shall first be irrevocably paid in full before any Subordinated Lender shall be entitled to receive and to retain any payment, distribution, other rights or benefits in respect of any Junior Liability. In order to enable each
Senior Lender to enforce its rights hereunder in any such action or proceeding, each Senior Lender is hereby irrevocably authorized and empowered in its discretion as attorney in fact for each Subordinated Lender to make and present for and on
behalf of such Subordinated Lender such proofs of claims against the Company and/or its Subsidiaries as the Agent may deem expedient or proper and to vote such proofs of claims in any such proceeding and to receive and collect any and all dividends
or other payments or disbursements made thereon in whatever form the same may be paid or issued and to apply same on account of any the Senior Liabilities. In the event, prior to indefeasible payment in full of the Senior Liabilities, any
Subordinated Lender shall receive any payment in respect of the Junior Liabilities and/or in connection with the enforcement of such Subordinated Lender’s rights and remedies against the Company and/or any of its Subsidiaries, whether arising
in connection with the Junior Liabilities or otherwise, then such Subordinated Lender shall forthwith deliver, or cause to be delivered, the 

  

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same to the Agent in precisely the form held by such Subordinated Lender (except for any necessary endorsement) and until so delivered the same shall be held
in trust by such Subordinated Lender as the property of the Senior Lender. 
 5. Each Subordinated Lender will mark its/his books and records
so as to clearly indicate that its/his respective Junior Liabilities are subordinated in accordance with the terms of this Agreement. Each Subordinated Lender will execute such further documents or instruments and take such further action as the
Agent may reasonably request from time to time to carry out the intent of this Agreement. 
 6. Each Subordinated Lender hereby waives all
diligence in collection or protection of or realization upon the Senior Liabilities or any security for the Senior Liabilities. 
 7. No
Subordinated Lender will without the prior written consent of the Agent: (a) attempt to enforce or collect any Junior Liability or any rights in respect of any Junior Liability; or (b) commence, or join with any other creditor in
commencing, any bankruptcy, reorganization, or insolvency proceedings with respect to the Company and/or any of its Subsidiaries. 
 8. The
Agent, on its own behalf and on behalf of the Lenders, may, from time to time, at its sole discretion and without notice to any Subordinated Lender, take any or all of the following actions: (a) retain or obtain a security interest in any
property to secure any of the Senior Liabilities; (b) retain or obtain the primary or secondary obligation of any other obligor or obligors with respect to any of the Senior Liabilities; (c) extend or renew for one or more periods (whether
or not longer than the original period), alter, increase or exchange any of the Senior Liabilities, or release or compromise any obligation of any nature of any obligor with respect to any of the Senior Liabilities; and (d) release its security
interest in, or surrender, release or permit any substitution or exchange for, all or any part of any property securing any of the Senior Liabilities, or extend or renew for one or more periods (whether or not longer than the original period) or
release, compromise, alter or exchange any obligations of any nature of any obligor with respect to any such property. 
 9. The Agent, on
its own behalf and on behalf of the Lenders, may, from time to time, whether before or after any discontinuance of this Agreement, without notice to any Subordinated Lender, assign or transfer any or all of the Senior Liabilities or any interest in
the Senior Liabilities; and, notwithstanding any such assignment or transfer or any subsequent assignment or transfer of the Senior Liabilities, such Senior Liabilities shall be and remain Senior Liabilities for the purposes of this Agreement, and
every immediate and successive assignee or transferee of any of the Senior Liabilities or of any interest in the Senior Liabilities shall, to the extent of the interest of such assignee or transferee in the Senior Liabilities, be entitled to the
benefits of this Agreement to the same extent as if such assignee or transferee were a Senior Lender, as applicable; provided, however, that, unless the Agent on its own behalf and on behalf of the Lenders, shall otherwise consent in writing, the
Senior Lenders shall have an unimpaired right, prior and superior to that of any such assignee or transferee, to enforce this Agreement, for the benefit of the Senior Lenders, as to those of the Senior Liabilities which the Senior Lenders have not
assigned or transferred. 
  

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 10. The Senior Lenders shall not be prejudiced in their rights under this Agreement by any act or failure
to act of any Subordinated Lender, or any noncompliance of any Subordinated Lender with any agreement or obligation, regardless of any knowledge thereof which any Senior Lender may have or with which any Senior Lender may be charged; and no action
of any Senior Lender permitted under this Agreement shall in any way affect or impair the rights of any other Senior Lender and the obligations of any Subordinated Lender under this Agreement. 
 11. No delay on the part of any Senior Lender in the exercise of any right or remedy shall operate as a waiver of such right or remedy, and no single or
partial exercise by the Senior Lenders of any right or remedy shall preclude other or further exercise of such right or remedy or the exercise of any other right or remedy; nor shall any modification or waiver of any of the provisions of this
Agreement be binding upon any Senior Lender except as expressly set forth in a writing duly signed and delivered by the Agent on it own behalf and on behalf of the Senior Lenders. For the purposes of this Agreement, Senior Liabilities shall have the
meaning set forth in Section 1 above, notwithstanding any right or power of any Subordinated Lender or anyone else to assert any claim or defense as to the invalidity or unenforceability of any such obligation, and no such claim or defense
shall affect or impair the agreements and obligations of any Subordinated Lender under this Agreement. 
 12. This Agreement shall continue
in full force and effect after the filing of any petition (“Petition”) by or against the Company and/or any of its Subsidiaries under the United States Bankruptcy Code (the “Code”) and all converted or succeeding
cases in respect thereof. All references herein to the Company and/or Subsidiary shall be deemed to apply to the Company and such Subsidiary as debtor-in-possession and to a trustee for the Company and/or such Subsidiary. If the Company or any of
its Subsidiaries shall become subject to a proceeding under the Code, and if the Senior Lenders shall desire to permit the use of cash collateral or to permit or provide post-Petition financing from any Senior Lender (or an affiliate or a third
party satisfactory to the Senior Lenders) to the Company or any such Subsidiary under the Code, each Subordinated Lender agrees as follows: (1) adequate notice to such Subordinated Lender shall be deemed to have been provided for such consent
or post-Petition financing if such Subordinated Lender receives notice thereof three (3) business days (or such shorter notice as is given to the Senior Lenders) prior to the earlier of (a) any hearing on a request to approve such
post-petition financing or (b) the date of entry of an order approving same and (2) no objection will be raised by any Subordinated Lender to any such use of cash collateral or such post-Petition financing from any Senior Lender (or an
affiliate of the Senior Lender). 
 13. This Agreement shall be binding upon each Subordinated Lender and upon the heirs, legal
representatives, successors and assigns of each Subordinated Lender and the successors and assigns of any Subordinated Lender. This Agreement may be executed in one or more counterparts, each of which shall be deemed an original and all of which
together shall be deemed to constitute one agreement. It is understood and agreed that if facsimile copies of this Agreement bearing facsimile signatures are exchanged between the parties hereto, such copies shall in all respects have the same
weight, force and legal effect and shall be fully as valid, binding, and enforceable as if such signed facsimile copies were original documents bearing original signature. 
  

 5 

 14. So long as any of the Senior Liabilities shall remain outstanding, no Subordinated Lender shall
permit any of the Subordinated Lender Documents to be amended, modified or otherwise supplemented without the prior written consent of the Agent. 
 15. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED, INTERPRETED AND ENFORCED ACCORDING TO, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF LAWS PROVISIONS THEREOF AND SHALL BE BINDING UPON THE PARTIES
HERETO AND THEIR RESPECTIVE SUCCESSORS AND ASSIGNS. ANY ACTION BROUGHT CONCERNING THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT SHALL BE BROUGHT ONLY IN THE STATE COURTS OF NEW YORK OR IN THE FEDERAL COURTS LOCATED IN THE STATE OF NEW YORK;
PROVIDED, HOWEVER, THAT THE SENIOR LENDER MAY CHOOSE TO WAIVE THIS PROVISION AND BRING AN ACTION OUTSIDE THE STATE OF NEW YORK. The individuals executing this Agreement on behalf of the Subordinated Lenders agree to submit to the jurisdiction of
such courts and waive trial by jury. The prevailing party shall be entitled to recover from the other party its reasonable attorneys’ fees and costs. Wherever possible each provision of this Agreement shall be interpreted in such manner as to
be effective and valid under applicable law, but if any provision of this Agreement shall be prohibited by or invalid under such law, such provision shall be ineffective to the extent of such prohibition or invalidity, without invalidating the
remainder of such provision or the remaining provisions of this Agreement. 
 16. Notwithstanding anything to the contrary stated in any
UCC-1 filed in connection with the loans set forth in the Subordinated Lender Documents or any provision of the applicable UCC, Subordinated Lenders hereby agree that all Liens granted to Subordinated Lenders in connection with the Subordinated
Lender Documents shall have equal priority, and shall be treated as pari passu liens, without regard to the timing or order of the filing of any UCC-1 memorializing the Liens in favor of any or all of the Subordinated Lenders.

 [signature page follows] 
  

 6 

 IN WITNESS WHEREOF, this Agreement has been made and delivered this 19th day of September, 2008.

  

			
	SUBORDINATED LENDER:
	
	  

		
	By:	 	  

	Name:	 	
	Title:	 	

 [Signatures Continued on Next Page] 

			
	VALENS OFFSHORE SPV I, LTD.
		
	By:	 	Valens Capital Management, LLC, its
		 	investment manager
		
	By:	 	  

	Name:	 	
	Title:	 	

 [Signatures Continued on Next Page] 

			
	VALENS OFFSHORE SPV II, CORP.
		
	By:	 	Valens Capital Management, LLC, its
		 	investment manager
		
	By:	 	  

	Name:	 	
	Title:	 	

 [Signatures Continued on Next Page] 

			
	PSOURCE STRUCTURED DEBT LIMITED
		
	By:	 	Laurus Capital Management, LLC, its
		 	investment manager
		
	By:	 	  

	Name:	 	
	Title:	 	

 [Signatures Continued on Next Page] 

			
	LV ADMINISTRATIVE SERVICES, INC.,
	individually and as Agent
		
	By:	 	  

	Name:	 	
	Title:	 	

 [Signatures Continued on Next Page] 

			
	Acknowledged and Agreed to by:
	
	BIOVEST INTERNATIONAL, INC.
		
	By:	 	  

	Name:	 	Steven Arikian, M.D.
	Title:	 	Chairman & CEO

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