Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in the following Registration Statements:
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(1) | Registration Statement (Form S-3 No. 333-291329) of Altimmune, Inc., |
(2) | Registration Statement (Form S-3 No. 333-285355) of Altimmune, Inc., |
(3) | Registration Statement (Form S-8 No. 333-293262) pertaining to 2017 Omnibus Incentive Plan of Altimmune, Inc., |
(4) | Registration Statement (Form S-8 No. 333-285350) pertaining to 2017 Omnibus Incentive Plan of Altimmune, Inc., |
(5) | Registration Statement (Form S-8 No. 333-278273) pertaining to 2017 Omnibus Incentive Plan of Altimmune, Inc., |
(6) | Registration Statement (Form S-8 No. 333-270109) pertaining to 2017 Omnibus Incentive Plan of Altimmune, Inc., |
(7) | Registration Statement (Form S-8 No. 333-263569) pertaining to 2017 Omnibus Incentive Plan of Altimmune, Inc., |
(8) | Registration Statement (Form S-8 No. 333-248232) pertaining to 2017 Omnibus Incentive Plan of Altimmune, Inc., |
(9) | Registration Statement (Form S-8 No. 333-233273) pertaining to 2017 Omnibus Incentive Plan of Altimmune, Inc., |
(10) | Registration Statement (Form S-8 No. 333-230722) pertaining to 2019 Employee Stock Purchase Plan of Altimmune, Inc., |
(11) | Registration Statement (Form S-8 No. 333-228623) pertaining to 2018 Inducement Grant Plan of Altimmune Inc., and |
(12) | Registration Statement (Form S-8 No. 333-217846) pertaining to 2001 Employee Stock Option Plan, 2001 Non-Employee Stock Option Plan, and 2017 Omnibus Incentive Plan of Altimmune, Inc., |
of our report dated March 6, 2026, with respect to the consolidated financial statements of Altimmune, Inc., included in this Annual Report (Form 10-K) of Altimmune, Inc. for the year ended December 31, 2025.
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/s/ Ernst & Young LLP |
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Iselin, New Jersey |
March 6, 2026 |