In A Small Study, A Booster Vaccine Protects Against COVID-19 Variants

The results of a new study from the United Kingdom’s University of Nottingham suggest that single booster shots of Pfizer’s two-dose Covid-19 vaccine can help ward off infection by at least some of the dangerous variants of SARS-CoV-2, which is the Covid-19 virus. In the study, the booster proved especially effective in people who, prior to being vaccinated, had contracted Covid-19 and survived the infection. This may be because natural infection coupled with three doses of vaccine provided a total of four exposures to the virus’ spike protein.