Cómo funciona la vacuna de Pfizer-BioNTech

Health
By POR JONATHAN CORUM AND CARL ZIMMER from NYT Health https://ift.tt/3bZcWTx
via IFTTT Coronavirus (2019-nCoV), Vaccination and Immunization Dos inyecciones pueden preparar el sistema inmunitario para combatir el coronavirus.

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