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1 feb 1970 año - Polio gone

Descripción:

Polio was almost eradicated in the US by the 1970s ("How Mandatory Vaccination Fueled the Anti-Vaxxer Movement")

Añadido al timeline:

History of Anti-Vaxxers

Byo

9 dic 2019

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314

fecha:

1 feb 1970 año

Ahora mismo

~ 55 years ago

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