"125 years since the discovery of blood groups" 1,00 SPECIAL STAMP
Material number 0225390Karl Landsteiner, an Austrian doctor and immunologist, discovered different blood groups in 1900. He identified groups A, B, and C (now known as O), and shortly after, group AB. These blood groups are determined by antigens on red blood cells, which cause antibodies to form in blood of different types. People with blood type O are universal donors, while those with blood type AB are universal recipients. Landsteiner published his findings in 1901 and received the Nobel Prize in 1930. He also discovered the Rhesus factor in 1940. His birthday, June 14, is now World Blood Donor Day. Blood donations are crucial as blood cannot be replaced by any other substance.
Karl Landsteiner, an Austrian doctor and immunologist, discovered different blood groups in 1900. He identified groups A, B, and C (now known as O), and shortly after, group AB. These blood groups are determined by antigens on red blood cells, which cause antibodies to form in blood of different types. People with blood type O are universal donors, while those with blood type AB are universal recipients. Landsteiner published his findings in 1901 and received the Nobel Prize in 1930. He also discovered the Rhesus factor in 1940. His birthday, June 14, is now World Blood Donor Day. Blood donations are crucial as blood cannot be replaced by any other substance.