French scientists Francoise Barre-Sinoussi (L) and Luc Montagnier, named as joint winners of the Nobel Prize in Medicine on October 6, 2008, are seen in this 2005 file photo released by the Institut Pasteur in Paris. Barre-Sinoussi and Montagnier, two French scientists who discovered the AIDS virus, and German Harald zur Hausen who bucked conventional wisdom to find a virus that causes cervical cancer were awarded the 2008 Nobel prize for medicine on Monday. REUTERS/Copyright Institut Pasteur/Handout (FRANCE). FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.
Reuters/HO