Office of the Chief Science Officer Mail Stop: 6502A Ottawa, Ontario K1A OK9 Canada July 31, 2014 Dr. Nick Vahanian BioProtection Systems Corporation, Iowa State University Research Park Ames, Iowa, 50010 USA Dear Dr. Vahanian, Re: Amendment to the...

EXHIBIT 10.5

Office of the Chief Science Officer

130 Colonnade - Floor: 2 - Room: 216A

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Mail Stop: 6502A

Ottawa, Ontario K1A OK9 Canada

July 31, 2014

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BioProtection Systems Corporation,

Iowa State University Research Park

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Ames, Iowa, 50010 USA

Dear ▇▇. ▇▇▇▇▇▇▇▇,

Re: Amendment to the Sole License Agreement between Her Majesty the Queen in Right of Canada as Represented by the Minister of Health and BioProtection Systems Corporation, executed on May 4, 2010.

Canada and BioProtection Systems Corporation (BPSC) have executed a License Agreement dated May 04, 2010, under which Canada granted a license to BPS to commercialize the technology developed by Canada known as the recombinant vesicular stomatitis virus vaccine for viral hemorrhagic fevers (rVSV). For greater clarity, the Parties hereby agree to amend the License Agreement to define the scope of the “Licensed Rights” as follows:

1. Under Section 1.13 “Licensed Rights”, subsection 1.13.3 will be added to read as follows: 1.13.3 Confidential Information respecting the manufacturing processes for products resulting from the exercise of other Licensed Rights, including Patents and Improvements, either owned by or licensed to Canada, and as further described in Appendix A (Description of the Licensed Rights).

All other terms and conditions of the License Agreement will remain unchanged and in full force and effect and shall continue for the duration of the License Agreement. This letter, upon the date of last signature by both parties, shall form part of the License Agreement and the two documents shall be read together.

If the foregoing amendment is satisfactory, please countersign this letter on behalf of BPSC in the space provided, and return one copy of the signed letter to ▇▇. ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, Public Health Agency of Canada, ▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇, ▇▇ ▇▇▇ ▇▇▇.

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EXHIBIT 10.5

Sincerely,

/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇

▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, PhD

Chief Science Officer

Public Health Agency of Canada

Acknowledged and agreed to on behalf of BioProtection Systems Corporation

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▇▇▇▇ ▇▇▇▇▇▇▇▇, MD            Date

Chief Medical Officer, BPSC

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