Study estimates effectiveness of 2-dose and 3-dose mRNA vaccination against Omicron

In a recent study posted to the medRxiv* preprint server, researchers estimated the efficacy of two-dose and three-dose regimens of two messenger ribonucleic acid (mRNA) vaccines: Moderna’s mRNA-1273 and Pfizer-BioNTech’s BNT162b2 against coronavirus disease 2019 (COVID-19) caused due to the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron variant.