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2500 B.C. – Egyptians used bloodletting to try to cure diseases
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500 B.C. – Greeks distinguished between arteries and veins
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1659 A.D. – Anton van Leeuwenhoek viewed blood cells under a microscope
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1795 – First blood transfusion performed
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1901 – Karl Landsteiner discovered three blood types: A, B, O
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1902 – Alfred Decastello discovered fourth blood type: AB
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1922 – Percy Oliver established the first blood donor service
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1935 – Mayo Clinic developed a method to store blood for transfusions
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1937 – Dr. Bernard Fantus established the first blood bank
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1940 – Karl Landsteiner discovered the Rh protein
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1959 – First case of AIDS recorded in the Congo
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1984 – Robert Gallo identified the virus causing AIDS
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1985 – Development of ELISA test to screen for diseases such as HIV
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1987 – Scientists began developing blood-screening tests for infectious diseases