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  Persian doctor who discovered difference between measles and small pox.
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  First time for both baby and mother to live.
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  Zacharius Jannssen
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  Publishes a book about how blood is pumped through the heart.
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  Makes 500 different models of microscopes and discovers blood cells.
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  Invented by René Laënnec
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  First women to receive a medical degree.
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  Developed by Felix Hoffman
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  Develops first polio
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  Dolly the sheep
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  Replicating an animals DNA