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jan 1, 1796 - Edward Jenner and Variolation (Smallpox)

Description:

*Variolation: purposely infect with smallpox to create a mild infection to create immunity

*30% mortality rate for smallpox vs 1-2% mortality rate from variolation

*Jenner observed that milk maids that had cowpox did not contract smallpox

*Jenner experimented with a boy and infected him with cowpox. After retesting with smallpox, the boy didn't get it.

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Date:

jan 1, 1796
Now
~ 223 years ago
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