OpenSAFELY study shows the effectiveness of Pfizer COVID booster doses

In a recent study posted to the medRxiv pre-print server, researchers assessed the effectiveness of the Pfizer–BioNTech BNT162b2 coronavirus disease 2019 (COVID-19) vaccine in the seven million United Kingdom (UK) adults who were eligible to receive booster shots between 16 September and 16 December 2021.