One dose of a Covid vaccine can almost halve transmission, study finds
A nurse Cindy Mendez wearing a protective mask holds a syringe with a dose of the Pfizer-BioNTech COVID-19 vaccine during the coronavirus disease (COVID-19) pandemic, at NYC Health + Hospitals Harlem Hospital in the Manhattan borough of New York City, New York, February 25, 2021. Jeenah Moon | Reuters LONDON — A single dose of… Read More »
