1 Karl Landsteiner(Physician)
Karl Landsteiner was a physician, biologist, and immunologist. He is credited with distinguishing the main blood groups as well as identifying the Rhesus factor. He is also credited with discovering the polio virus along with Erwin Popper and Constantin Levaditi. He won the Aronson Prize in 1926. In 1930, Landsteiner was honored with the Nobel Prize in Physiology or Medicine.