Posted in Uncategorized COVID vaccine efficacy wanes amid delta variant surge, CDC … November 20, 2022 The delta variant now accounts for more than 95% of U.S. cases, according to the CDC, and has led to a rise in the death rate in 43 states, the worst tally since December, before America’s … https://www.usatoday.com/story/news/health/2021/08/24/covid-vaccine-efficacy-delta-variant-cdc-study-los-angeles/5578703001/