Vaccine Efficacy Diminished as Delta Arose, CDC Report Shows
Authors: John Tozzi 17 hrs ago (Bloomberg) — The effectiveness of Covid-19 vaccines among front-line workers declined to 66% after the delta variant became dominant, compared with 91% before it arose, according to a report from the U.S. Centers for Disease Control and Prevention. The vaccines are still protective, the CDC said, and the finding must […]