Important update: Healthcare facilities
CDC has updated select ways to operate healthcare systems effectively in response to COVID-19 vaccination. Learn more
UPDATE
Given new evidence on the B.1.617.2 (Delta) variant, CDC has updated the guidance for fully vaccinated people. CDC recommends universal indoor masking for all teachers, staff, students, and visitors to K-12 schools, regardless of vaccination status. Children should return to full-time in-person learning in the fall with layered prevention strategies in place.
UPDATE
The White House announced that vaccines will be required for international travelers coming into the United States, with an effective date of November 8, 2021. For purposes of entry into the United States, vaccines accepted will include FDA approved or authorized and WHO Emergency Use Listing vaccines. More information is available here.
UPDATE
Travel requirements to enter the United States are changing, starting November 8, 2021. More information is available here.

Transmission

Transmission
Omicron Variant

Learn what you should know about Omicron and other COVID-19 variants.

About Omicron About Variants
When to wear a mask
  • Wear a mask with the best fit, protection, and comfort for you.
  • If you are in an area with a high COVID-19 Community Level and are ages 2 or older, wear a mask indoors in public.
  • If you are sick and need to be around others, or are caring for someone who has COVID-19, wear a mask.
  • If you are at increased risk for severe illness, or live with or spend time with someone at higher risk, speak to your healthcare provider about wearing a mask at medium COVID-19 Community Levels.
Have questions about getting or spreading COVID-19 after being vaccinated?

Learn more about COVID-19 vaccine myths and facts.

Handouts & Posters
Stop the Spread of Germs

Stop the Spread of Germs

Wear a mask, stay home when sick, wash your hands and more tips to help stop the spread. View PDF pdf icon[537 KB, 1 page]

Infographic: Help protect yourself and others from COVID-19

Protect Yourself & Others

Stay 6 feet apart, wear a mask, and wash your hands to stop spread of COVID-19. View PDF pdf icon[309 KB, 1 page]