Exhibit 99.1

AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, each of the undersigned agrees to the joint filing of a Statement on Schedule 13D (including amendments thereto) with respect to the Common Stock of Altimmune, Inc. The undersigned hereby further agree that this Joint Filing Agreement be included as an exhibit to any such statement and any such amendment. The undersigned further agree that each party hereto is responsible for the timely filing of such statements and amendments, and for the completeness and accuracy of the information concerning it contained herein and therein, but shall not be responsible for the completeness and accuracy of the information concerning any other filing party, unless such party knows or has reason to believe that such information is inaccurate. The undersigned hereby further agree that this Joint Filing Agreement may be executed in any number of counterparts, each of which when so executed shall be deemed to be an original, but all of which counterparts shall together constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned hereby execute this Joint Filing Agreement as of the 15th day of May, 2017.

/s/ Philip Hodges
Philip Hodges
REDMONT VENTURE PARTNERS, INC.
/s/ Philip Hodges
By:	Philip Hodges
Its:	Authorized Signatory
REDMONT VAXN CAPITAL HOLDINGS, LLC
/s/ Philip Hodges
By:	Philip Hodges
Its:	Authorized Signatory
PARADIGM VENTURE PARTNERS, L.P.
/s/ Philip Hodges
By:	Philip Hodges
Its:	Authorized Signatory

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