Exhibit 99.1
Joint Filing Agreement
The undersigned hereby agree that the Statement on Schedule 13G, as amended, dated February 21, 2014 with respect to the shares of Common Stock of GenVec, Inc. and any amendments thereto executed by each and any of the undersigned shall be filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended.
| Dated: February 21, 2014 | EcoR1 Capital Fund, L.P. |
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| | By: | EcoR1 Capital, LLC General Partner |
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| | By: | /s/ Oleg Nodelman |
| | | Name: | Oleg Nodelman |
| | | Title: | Manager |
| | EcoR1 Capital Fund Qualified, L.P. |
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| | By: | EcoR1 Capital, LLC General Partner |
| | |
| | By: | /s/ Oleg Nodelman |
| | | Name: | Oleg Nodelman |
| | | Title: | Manager |
| | EcoR1 Capital, LLC |
| | |
| | By: | /s/ Oleg Nodelman |
| | | Name: | Oleg Nodelman |
| | | Title: | Manager |
| | /s/ Oleg Nodelman |
| | Oleg Nodelman |
