(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.,