What year did Landsteiner and Wiener discover the Rhesus factor?
1925
1937
1940
1950
Answer
The Rhesus factor, discovered in 1937 by Landsteiner and Wiener, is an important component of human blood typing. It categorizes individuals as either Rh-positive or Rh-negative based on the presence or absence of a specific antigen on the red blood cells. Understanding the Rhesus factor is crucial in blood transfusions and preventing complications such as Rh incompatibility during pregnancy.
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