Vaccine
InventorEdward Jenner
Year1796
CategoryMedicine
OriginEngland
About Vaccine
Jenner observed that milkmaids who had cowpox never got smallpox. He tested this by infecting a boy with cowpox then smallpox. The boy was immune. The word vaccine comes from vacca, Latin for cow. Smallpox was declared eradicated in 1980.
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