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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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22 abr 1800 año - First use of Small pox vaccine
Descripción:
in Boston, MA by Edward Jenner when he inoculated a boy
Añadido al timeline:
Diseases that challenged the scientific community
By
Erica Nguyen
14 dic 2018
1
0
613
fecha:
22 abr 1800 año
Ahora mismo
~ 225 years ago
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