Friday, February 19, 2021

Primera dosis de vacuna Pfizer contra Covid-19 es eficaz en un 85%, de 2 a 4 semanas: estudio - video

 

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 La primera dosis de la vacuna contra el Covid-19 de Pfizer/BioNtech es eficaz en un 85% dos a cuatro semanas después de su administración, según un estudio israelí

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