Pfizer: Vaccine effective up to 6 months later
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 updated results Thursday fr…
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 updated results Thursday fr…