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1 ene 1796 año - First succesful vaccine

Descripción:

The first vaccine was created by Edward Jenner after he noticed that milkmaids who caught cowpox were protected against smallpox, and then created the first vaccine which was inoculated cowpox

Añadido al timeline:

5 major contributions made by scientists

ByBob Arnold
8 ene 2020

fecha:

1 ene 1796 año
Ahora mismo
~ 228 years ago

Fotos:

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