Pfizer: Vaccine Effective up to 6 Months Later
By The Associated Press NEW YORK -- Pfizer says its vaccine continues to be effective against COVID-19 up to six months later. Pfizer and its German partner, BioNTech, announced up…
By The Associated Press NEW YORK -- Pfizer says its vaccine continues to be effective against COVID-19 up to six months later. Pfizer and its German partner, BioNTech, announced up…