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Diocles wrote the first known anatomy book
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Birth of Hippocrates, the Greek father of medicine begins the scientific study of medicine and prescribes a form of aspirin
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Leonardo da Vinci dissects corpses
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Vesalius publishes findings on human anatomy in De Fabrica Corporis Humani
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William Harvey publishes An Anatomical Study of the Motion of the Heart and of the Blood in Animals which forms the basis for future research on blood vessels, arteries and the heart
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Giacomo Pylarini gives the first smallpox inoculations
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Claudius Aymand performs the first successful appendectomy
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Edward Jenner develops the process of vaccination for smallpox, the first vaccine for any disease
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Elizabeth Blackwell is the first woman to gain a medical degree from Geneva Medical College in New York
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Louis Pasteur identifies germs as cause of disease
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Wilhelm Conrad Roentgen discovers X rays
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Felix Hoffman develops aspirin
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Birth of Galen. Greek physician to gladiators and Roman emperors