Real-World Studies Show Pfizer Vaccine Shields Against COVID Variants
THURSDAY, May 6, 2021 (HealthDay News) — In two real-world studies, Pfizer’s COVID-19 vaccine appears to be standing up well against the challenges posed by more contagious coronavirus variants from Britain and South Africa. The Pfizer mRNA vaccine showed about 90% documented effectiveness in protecting against infection with the BritishContinue Reading