Tag: Pfizer COVID-19 vaccine 85% effective after single dose

A vaccine developed by Pfizer-BioNTech cut symptomatic COVID-19 disease by 85% after the first dose, according to Israeli researchers. Findings were outlined in correspondence published in The Lancet on Friday, drawing on results from 7,214 health care workers at the Sheba Medical Center. Researchers found the 85% reduction in disease 15 to 28 days after the first dose, and reported a…