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Medical worker Michelle Chester shows a Pfizer coronavirus disease (Covid-19) vaccine before giving it to nurse Sandra Lindsay, who was among the first to receive it, and who will receive the second dose at Long Island Jewish Medical Center in the Queens borough of New York City, on January 4, 2021. (Photo by SHANNON STAPLETON / POOL / AFP) (Photo by SHANNON STAPLETON/POOL/AFP via Getty Images)

REPORTE CIENTÍFICO DE ÚLTIMA HORA SOBRE VIRUELA DEL SIMIO O DEL MONO.