Novavax’s Vaccine Works Well — Except on Variant First Found in South Africa

An early analysis in Britain found that the vaccine had an efficacy rate of nearly 90 percent. But in a small South Africa trial, the efficacy rate dropped to just under 50 percent.Read MoreNovavax Inc, Vaccination and Immunization, Clinical Trials, Coronavirus (2019-nCoV), your-feed-scienceNYT > U.S. News