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13 oct 1879 año - Variolation
Descripción:
Purposely infect an individual with smallpox to create immunity. 1-3% chance of working
Añadido al timeline:
The History of Infectious Diseases
By
Valerie Lu
14 dic 2018
1
0
758
fecha:
13 oct 1879 año
Ahora mismo
~ 144 years ago
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