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describes the circulation of blood
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successfully transfuses blood from a lamb to a human
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first observes living bacteria
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Known for population growth and the effects of it
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uses cowpox to immunize against smallpox
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he formed a theory to explain how evolution may take place
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became a trained nurse
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invents sterilization
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proves Bacillus anthracis causes anthrax
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uses sterile surgical techniques
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treats rabies with vaccination
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invention of better microscopes allowed biologists to discover the basic facts of cell division and sexual reproduction
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determined three of four blood types
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invents Salversan, a drug for syphilis
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developer of oral live virus polio vaccine
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discovers antibiotic effects of penicillin mold
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set up collection centers for blood to fill World War II needs
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isolated pencicillin and create first antibiotic drug
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an injectable polio vaccine is introduced
