New Data Boost Calls for Single COVID-19 Vaccine Dose

February 19, 2021

(Medscape) – A single dose of the Pfizer/BioNTech vaccine offers 92.6% efficacy in new calculations based on data submitted to the US Food and Drug Administration (FDA), researchers report. Together with previous findings that a single Moderna vaccine dose provides 92.1% efficacy against SARS-CoV-2 infection, investigators propose it is time to defer the second dose to extend protection to more people through single-dose mRNA vaccinations.