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Discovered difference between smallpox and measles.
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The book of Healing and The Cannon of Medicine was written
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Leonardo da Vinci dissects corpses
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invents the microscope
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Anton van Leeuwenhoek observes bacteria.
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He develops the process of vaccination for smallpox, the first vaccine for any disease.
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performs the first successful transfusion of human blood
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Creates system to classify different blood types.
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study showed that adult cells including stem cells can be turned back into stem cells
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discovered how to make healthy liver out of stem cells
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