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1 ene 1974 año - Expanded Programme on Immunization

Descripción:

WHA expands its immunization program to include measles, diphtheria, tetanus, tb, pertussis, and polio

Añadido al timeline:

From A to Zika: Diseases and Medical Advancements Through Time

14 dic 2018

1

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1211

fecha:

1 ene 1974 año

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~ 51 years ago

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