Scientist. Nobel Prize in Medicine 1976. Identified Hepatitis B virus & developed the diagnostic test & vaccine for it. Professor of Medicine & Anthropology at the University of Pennsylvania since 1977
British physiologist and pioneer in Reproductive medicine and in-vitro fertilization (IVF) in particular - the first test-tube baby. 2010 Nobel Prize in Physiology or Medicine 'for the development of in vitro fertilization'