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  Egyptians used bloodletting to try to cure diseases.
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  Greeks distinguished between arteries and veins
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  Anton Van Leeuwenhoek viewed blood cells under a microscope.
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  First blood transfusion performed.
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  Karl Landsteiner discovered three blood types A,B,O
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  Alfred Decastello discovered fourth blood type AB
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  Percy Oliver established the first blood donor service.
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  Mayo Clinical developed a method to store blood transfusions.
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  Dr.Bernard Fantus established the first blood bank.
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  Karl Landsteiner discovered the RH protein.
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  First case of AIDS recorded in the Congo.
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  Robert Gallo identified the virus causing AIDS.
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  Development of Elisa test to screen for diseases such as HIV.
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  Scientists began developing blood screening tests for infectious diseases.