Heat Shock Protein Platform: Prophage Series GThe Prophage Series G vaccines (HSPPC-96; vitespen) are being studied in two different settings of glioma: newly diagnosed and recurrent disease. Glioma is the deadliest form of brain cancer with an average survival of six to 14 months. Heat Shock Protein Platform: Recombinant Series HerpV HerpV is the most advanced HSV-2 vaccine currently in clinical development for the treatment of genital herpes. Agenus plans to advance HerpV into a Phase 2 study in 2012 that will measure the effect of vaccination on viral shedding in individuals infected with HSV-2. Experts in HSV-2 clinical research believe that a reduction in viral shedding could translate into the clinical benefit of a reduction in recurrent outbreaks. Forward-Looking Statement This press release contains forward-looking statements, including statements regarding up-coming presentations and technologies, programs, and activities of the company and its licensees. These forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially. These risks and uncertainties include, among others, the factors described under the Risk Factors section of our Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission for the period ended June 30, 2012. Agenus cautions investors not to place considerable reliance on the forward-looking statements contained in this release. These statements speak only as of the date of this document, and Agenus undertakes no obligation to update or revise the statements. All forward-looking statements are expressly qualified in their entirety by this cautionary statement. Agenus' business is subject to substantial risks and uncertainties, including those identified above. When evaluating Agenus' business and securities, investors should give careful consideration to these risks and uncertainties. 1. The QS-21 Stimulon ® adjuvant and related agreements, and HerpV are assets of Antigenics, Inc., a wholly owned subsidiary of Agenus Inc. 2. QS-21 is a component of GSK adjuvant systems.