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Whose discoveries identified blood groups for safe transfusions?
ScienceMedicine
Quick Answer
Karl Landsteiner discovered the ABO blood group system. He identified the major blood types in 1900 and 1901.
The Full Story
Karl Landsteiner discovered the ABO blood group system, which made safer blood transfusions possible. By mixing blood samples in 1900 and 1901, he showed that some combinations cause clumping because the blood types are incompatible. He later helped identify the Rh factor as well. Landsteiner's work revolutionized transfusion medicine and earned him the 1930 Nobel Prize in Physiology or Medicine.
Key Facts
1.ABO blood groups were identified in 1900-1901
2.Landsteiner won the 1930 Nobel Prize in Medicine
3.The Rh factor was identified later
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"One discovery turned dangerous transfusions into life-saving medicine."