Millions of people around the world could very possibly owe their lives to David Ho, a Taiwanese-born researcher who early on realized that HIV was a virus. He pioneered the use of protease prohibitors and led the development of the "cocktails" of drug treatments taken by HIV positive individuals. Ho is one of the few medical researchers ever to receive the Time's Person of the Year honor. He shares the title with Popes, Presidents, business magnates and Kings (and a few villains since the designation is given to the person deemed to have the greatest impact on the world in the prior year). My quick study of the list indicates that Ho is the only individual medical researcher ever to be selected.