Exhibit 31.3
CERTIFICATION
I, William M. Greenman, certify that:
| 1. | I have reviewed this Amendment No. 1 to the quarterly report on Form 10-Q/A of Cerus Corporation; 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. |
| Date: September 22, 2014 | /s/ William M. Greenman | |||||
| William M. Greenman | ||||||
President and Chief Executive Officer (Principal Executive Officer) |
