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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
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4 ene 1961 año - Sabin vaccine was proven safe and was released to all people.
Añadido al timeline:
26 nov 2017
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405
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fecha:
4 ene 1961 año
Ahora mismo
~ 63 years ago
