Which scientist is associated with the discovery of blood groups in 1900?

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Multiple Choice

Which scientist is associated with the discovery of blood groups in 1900?

Karl Landsteiner first showed that human blood is not all the same but comes in distinct groups defined by specific markers on red blood cells. In 1900 he demonstrated that certain bloods clump when mixed with some sera and not with others, revealing the A, B, AB, and O blood groups. This discovery explains why some transfusions cause dangerous reactions and why compatibility testing before transfusion is essential. It opened the path to safe blood transfusion and the broader field of transfusion medicine. Landsteiner’s work earned the Nobel Prize in Physiology or Medicine in 1930. The other scientists contributed to different areas of medicine—cell pathology, serum therapy, and instrumentation—rather than discovering blood groups.

Karl Landsteiner first showed that human blood is not all the same but comes in distinct groups defined by specific markers on red blood cells. In 1900 he demonstrated that certain bloods clump when mixed with some sera and not with others, revealing the A, B, AB, and O blood groups. This discovery explains why some transfusions cause dangerous reactions and why compatibility testing before transfusion is essential. It opened the path to safe blood transfusion and the broader field of transfusion medicine. Landsteiner’s work earned the Nobel Prize in Physiology or Medicine in 1930. The other scientists contributed to different areas of medicine—cell pathology, serum therapy, and instrumentation—rather than discovering blood groups.

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