⏰ when
When was the ABO blood group system discovered?
Human BiologyBlood
Quick Answer
The ABO blood group system was discovered in 1900 and 1901. Karl Landsteiner identified the blood types that made safe transfusions possible.
The Full Story
Karl Landsteiner discovered the ABO blood group system in 1900 and published the findings in 1901. He showed that human blood could be divided into groups based on reactions between red cells and serum. This explained why some transfusions succeeded and others caused dangerous clumping. The discovery made modern blood banking and transfusion medicine possible, and Landsteiner later won the Nobel Prize in 1930.
Key Facts
1.Discovered in 1900–1901
2.By Karl Landsteiner
3.Won him the 1930 Nobel Prize
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