Antigenics To Present At Rodman & Renshaw 5th Annual Global Healthcare Conference

NEW YORK — May 13, 2008 — Antigenics Inc. (NASDAQ: AGEN) today announced that Garo Armen, PhD, the company’s chairman and chief executive officer, will present at the Rodman & Renshaw 5th Annual Global Healthcare Conference at the Le Meridien Beach Plaza Hotel, Monte Carlo, Monaco at 9:00 a.m. CET on Tuesday, May 20.

Dr. Armen will provide an overview of the company and its priority development programs, including Oncophage^® (vitespen) therapeutic cancer vaccine; QS-21™ vaccine adjuvant; AG- 707 therapeutic vaccine for genital herpes infection; and Aroplatin™ platinum agent for cancers.

The audio portion of the presentation and presentation slides will be webcast live and available by replay on the Rodman & Renshaw website at http://wsw.com/webcast/rrshq13/agen.The replay will be available for approximately 90 days. The link to the audio replay and presentation slides will also be available on the Antigenics website, www.antigenics.com.

Antigenics is a biotechnology company working to develop treatments for cancers and infectious diseases.