On December 10, 2020, Pfizer Inc. and BioNTech SE announced that the New England Journal of Medicine has published safety and final efficacy results from the pivotal Phase 3 trial of BNT162b2, their mRNA-based COVID-19 vaccine candidate. In the trial of 43,448 participants, who were 16 years and older, 21,720 of whom received BNT162b2 and 21,728 placebo, the two-dose regimen of 30 μg BNT162b2, which was given 21 days apart, was well-tolerated and demonstrated vaccine efficacy of 95 against COVID-19.