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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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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

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5 major contributions made by scientists

ByBob Arnold
8 ene 2020
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fecha:

1 ene 1796 año
Ahora mismo
~ 229 years ago

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