1 gen 1796 anni - Edward Jenner and Variolation (Smallpox)
Descrizione:
*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.
Aggiunto al nastro di tempo:
New timeline
Data:
