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The symptoms of malaria were described in ancient Chinese medical writings.
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Jenner began to study the relationship between cowpox (a comparatively harmless disease) and the more dangerous and disfiguring smallpox.
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Jenner finalized the vaccine for cowpox
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John Snow proposed that cholera was transmitted through water.
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Cholera outbreak in Soho
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Begins research on Cholera
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Dies at the age of 45
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Malaria parasite was discovered
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Differentiation of Species of Malaria
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28% of americans have influenza
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Went to the University of Michigan on a research fellowship to develop an influenza vaccine
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National testing began on one million children, ages six to nine, who became known as the Polio Pioneers.
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John Salk's vaccine was proven safe and effective.
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Founding the Salk Institute for Biological Studies in La Jolla