#DeltaVariant is causing this #COVID19 surge across all 50 US states—even in heavily vaccinated ones. Vaccines definitely work, but we have to dispel the notion that 1 shot for 70% is enough. We likely need 85%+ double vaccinated coverage with 2x more contagious Delta. Stay safe. pic.twitter.com/m0RqRH53A7

— Eric Feigl-Ding (@DrEricDing) July 16, 2021