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proposed by Girolamo Fracastoro
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Edward Jenner creates a vaccine by inoculating a child with a little bit of cow pox. The child was then exposed to the real smallpox and and the child survived the sickness which was very rare.
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John Snow found that people were getting cholera from the infected watering holes. So he combated this becoming one of the first people to find the cause of a disease
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Releases his 4 requirements to indentify the cause of a disease. Would become known and the Koch-Henle Postulate and is still used today
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This was the day that the last case of Smallpox was diagnosed. A vaccine erradicated the disease with the help of the disease warriors.