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They used bloodletting to try to cure diseases
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They distinguished between arteries and veins
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He viewed blood cells under a microscope
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He discovered three blood types: A, B, O
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He discovered a fourth blood type: AB
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Established the first blood donor service.
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They developed a method to store blood for transfusions
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He established the first blood bank
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He discovered the Rh protein
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He identified the virus that was causing AIDS
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The development of the ELISA test to screen for diseases such as HIV
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Scientists began developing blood-screening tests for infectious diseases
