Las vacunas fabricadas por Pfizer-BioNTech y Moderna generan una reacción inmunitaria persistente en el organismo que puede proteger contra el coronavirus durante
Early results from a British vaccine study suggest that mixing different brands of vaccines can provoke a protective immune response against Covid-19.
WASHINGTON — President Biden, under pressure to aggressively address the global coronavirus vaccine shortage, will announce as early as Thursday that his
The Pfizer-BioNTech and Moderna coronavirus vaccines are 94 percent effective at preventing symptomatic Covid-19 illness, according to a new study of more
May 10, 2021 — The FDA on Monday granted emergency use authorization for the Pfizer coronavirus vaccine to be given to
The Pfizer-BioNTech and Moderna coronavirus vaccines are 94 percent effective at preventing hospitalization in fully vaccinated adults 65 or older, according to