CDC changes mask guidance in response to threat of Delta variant of Covid-19.

Commentary: CDC changes mask guidance in response to threat of Delta variant of Covid-19 – CNN

See guidance: Guidance for Implementing COVID-19 Prevention Strategies in the Context of Varying Community Transmission Levels and Vaccination Coverage – Centers for Disease Control and Prevention

Commentaries on Twitter

BREAKING—CDC reverses course—CDC is expected to recommend on Tuesday that people vaccinated for the coronavirus resume wearing masks indoors. The change follows reports of rising breakthrough infections with the #Deltavariant. ➡️ ABOUT DAMN TIME! #COVID19 https://t.co/VQeWOVviP3

— Eric Feigl-Ding (@DrEricDing) July 27, 2021

In a new @CDCMMWR, CDC recommends factors communities and organizations consider when deciding how to best prevent #COVID19. Factors include level of community spread, vaccination rates, & populations at risk of illness or death. More: https://t.co/0Jgr0PbRio. pic.twitter.com/j9zeZtQLtC

— CDC (@CDCgov) July 27, 2021