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La tercera dosis de refuerzo de la vacuna de ARNm Pfizer-BioNTech contra el SARS-CoV-2 después de dos dosis de esa vacuna o después de dos dosis de CoronaVac (hecha con el virus inactivado), ofrece pr. La tercera dosis de refuerzo de Pfizer protege contra la ómicron | Ciencia | Agencia EFE