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PRINCIPAL FINANCIAL OFFICER CERTIFICATION 
I, Diantha Duvall, certify that:
1.I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K of Genocea Biosciences, Inc.; and
2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
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|  |  | /s/ DIANTHA DUVALL | 
|  |  | Diantha Duvall | 
|  |  | Chief Financial Officer | 
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| Date: | April 29, 2022 |  |