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11h 7min, nov 9, 1948 y - Tos ferina: vacuna combinada con las del tétanos y la difteria

Description:

La primea vacuna DTP (difteria, tétanos y tos ferina) combinada estuvo disponible en Estados Unidos. Este

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Vacunación

16 Nov 2017

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11h 7min, nov 9, 1948 y

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~ 77 years ago

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