Born – November 23, 1957. He is an American doctor. William Kellin, Peter John Ratcliffe and Greg Semenza discovered the mechanisms of cellular oxygen sensing and adaptation to available oxygen. They explain the role of regulating gene activity in response to different oxygen levels. Received Nobel Prize in Medicine (2019) and Albert Lasker Award. 66. Bruce A. Beutler: Born – 29 December 1957 AD. He is an American immunologist and geneticist. Beutler and Hoffman discovered the genetic strategy for activating innate immunity. Awarded Nobel in Medicine (2011) and Albany Medical Center Prize.