Single dose of Pfizer BioNTech vaccine can reduce asymptomatic SARS-CoV-2 infections by rss feed | Feb 26, 2021 | News Feeds New data from Addenbrooke's Hospital in Cambridge suggests that a single dose of the Pfizer BioNTech vaccine can reduce by four-fold the number of asymptomatic SARS-CoV-2 infections. Read Original Copy