The Centers for Disease Control and Prevention revised its guidance Tuesday on wearing masks to help protect against infection from the coronavirus as the highly transmissible delta variant fuels a surge of cases. Under the new recommendations, the federal agency is urging vaccinated Americans to wear masks indoors in certain circumstances.

What to know

  • What exactly does the revised guidance say?
  • Why did the CDC change its guidance?
  • What was the previous guidance?
  • Haven’t some places begun requiring masks again on their own?
  • So, where should I be wearing a mask?