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Blood Types & Donation
Karl Landsteiner discovered ABO blood groups in 1901 โ made safe transfusions possible
Austria ๐ฆ๐น 1901 Human Body
Key Facts
- 1
Karl Landsteiner (1901) discovered ABO system; won Nobel Prize 1930; Rh factor discovered 1940
- 2
ABO groups + Rh factor = 8 main blood types: A+, Aโ, B+, Bโ, AB+, ABโ, O+, Oโ
- 3
India: O+ most common (37%), ABโ rarest (<1%); blood donation saves 3 lives per unit donated
๐ Did you know? O-negative is the universal donor blood type โ used in emergencies when recipient's blood type is unknown
Quick Reference
Category
Human Body
Country
๐ฆ๐น Austria
Year / Era
1901
About
Karl Landsteiner discovered ABO blood groups in 1901 โ made safe transfusions possible