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Egyptians used leaches to try to cure diseases
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The Greeks distinguished the difference between arteries and veins.
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Anton van Leeuwenhoek viewed blood cells under a microscope
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The first blood transfusion was performed
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Karl Landsteiner discovered the three main blood types: A, B, and O
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Alfred Decastello discovered the fourth blood type: AB
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Percy Oliver established the first blood donor service
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Mayo Clinic developed a method to store blood for 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 Chicago
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Robert Gallo identifies the virus causing AIDS
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Development of ELISA test (enzyme-linked immunosorbent assay) to screen for diseases such as HIV by detecting and measuring antibodies in blood
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Scientists began developing blood-screening tests for infectious diseases
