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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 1, 2025
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29 mar 1954 año - Measles vaccine
Descripción:
Safe, effective vaccine devloped
Mass immunization camoaign started to reduce casses of measles in developed countries
Añadido al timeline:
new disease
By
Tassya
14 dic 2018
1
0
553
fecha:
29 mar 1954 año
Ahora mismo
~ 71 years ago
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