Francoise Barre-Sinoussi (L) and Luc Montagnier of France attend the 2008 Nobel Prize ceremony at the Concert Hall in Stockholm December 10, 2008. The medicine prize was given to three researchers, with Barre-Sinoussi and Luc Montagnier of France awarded one half for their discovery of the "human immunodeficiency virus" and Harold zur Hausen of Germany awarded one half for his discovery of "human papilloma viruses causing cervical cancer". REUTERS/Bob Strong (SWEDEN)