Amendment No. 1 to License Agreement, by and between University of Basel and Hookipa Biotech GmbH, dated July 11, 2022

Exhibit 10.28

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AMENDMENT NO. 1 TO LICENSE AGREEMENT

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This Amendment (“Amendment”) is a modification of the License Agreement by and between University of Basel, having its principal offices located at Petersgraben 35, 4001 Basel, Switzerland (“UNIBAS”) and Hookipa Biotech GmbH, having its principal offices located at Helmut-Qualtinger-Gasse 2, 1030 Vienna, Austria (“Hookipa”), made effective on October 15, 2020 ("Agreement").

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This Amendment is made according to Article 10.6 of the Agreement. This Amendment is to be construed consistently insofar as possible with the Agreement, but in the event of a conflict, this Amendment shall control. Any capitalized terms used herein shall have the same meaning as set forth for such terms in the Agreement.

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The Parties hereby agree as follows:

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LICENSEE shall have the right to request one postponement of any one of the two milestones of Article 3.2(a)(ii) and (iii) above (i.e. only one under this paragraph) by eight (8) months against payment of a rescheduling fee of one hundred thousand Swiss Francs (CHF 100’000). If such milestone is so extended or postponed, the subsequent milestones are automatically extended or postponed by the same amount of time without additional fees.

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IN WITNESS WHEREOF, the Parties hereby have executed this Amendment the day and year herein written.

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