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Cell Genesys to Present at the Leerink Swann Solid Tumors Roundtable Conference May 2, 2008 Cell Genesys Reports First Quarter 2008 Financial Results May 1, 2008 Cell Genesys to Webcast First Quarter 2008 Conference Call April 24, 2008 Cell Genesys Reports Data on an Association Between Immune Response and Anti-Tumor Activity in Patients Receiving GVAX Immunotherapy for Prostate Cancer and Ipilimumab (MDX-010) April 15, 2008 Cell Genesys Reports Preclinical Data Demonstrating Superior Anti-Tumor Immunity for Multiantigen Compared to Single-Antigen Immunotherapies April 14, 2008