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Rhazes discovered the difference between small pox and measles.
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Ibn an-Nafis suggest that the right and left ventricles of the heart are separated and discovers the pulmonary circulation and coronary circulation
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Allowed for publication of medical discoveries.
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Antonie van Leeuwenhoek describes bacteria
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Francis Bacon uses microscope to discover plague fleas
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Edward Jenner develpos the process of vaccination for smallpox, the first vaccines for any disease.
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Louis Pasteur identifies germs as clause of disease.
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Karl Landsteiner introduces the system to classify blood into A, B, AB, and O groups
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