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1 янв 1796 г. - Edward Jenner and Variolation (Smallpox)

Описание:

*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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1 янв 1796 г.
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~ 228 г назад
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