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Dr. William Harvey discovers blood circulation
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Dr. Edward Jenner makes the first vaccine against small pox
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Dr. Louis Pasteur discovers the vaccine against rabies
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Dr. Wilhelm Conrad Rōntgen performed the first X-ray
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Dr. Albert Calmette and Dr. Camille Guérin develop a vaccine for tuberculosis
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Alexander Fleming discovers the first penicillin
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James Watson and Francis Crick discover DNA
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Luc Montagnier discovers HIV
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British scientists create the first clone of a sheep named Dolly
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Two doctors successfully performed the first face transplant on a woman severely injured by a dog