Exhibit 31.3
CERTIFICATION
I, Vijay B. Samant, certify that:
1. I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K/A of Vical Incorporated; 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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Date: March 3, 2009 | | | | By: | | /S/ VIJAY B. SAMANT |
| | | | | | | | Vijay B. Samant Chief Executive Officer |