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Karl Landsteiner
(Physician)
Birthdate: June 14, 1868
Sun Sign: Gemini
Birthplace: Vienna
Died: June 26, 1943
Karl Landsteiner, an Austrian American biologist, physician, and immunologist, made significant contributions to medicine. He is renowned for discovering the main blood groups, developing the modern blood classification system, and identifying the Rhesus factor with Alexander S. Wiener, leading to advancements in blood transfusions. He also played a key role in discovering the polio virus with Constantin Levaditi and Erwin Popper. Landsteiner's groundbreaking work earned him prestigious awards, including the Nobel Prize in Physiology or Medicine in 1930.