CDC has updated its guidance for people who are fully vaccinated. See Recommendations for Fully Vaccinated People.
CDC recommends schools continue to use the current COVID-19 prevention strategies for the 2020-2021 school year. Learn more
Important update: Healthcare facilities
CDC has updated select ways to operate healthcare systems effectively in response to COVID-19 vaccination. Learn more
Getting vaccinated prevents severe illness, hospitalizations, and death. Unvaccinated people should get vaccinated and continue masking until they are fully vaccinated. With the Delta variant, this is more urgent than ever. CDC has updated guidance for fully vaccinated people based on new evidence on the Delta variant.
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.

COVID-19 By the Numbers

COVID-19 By the Numbers
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9,428 CDC personnel supporting the outbreak response

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1,731 CDC deployers have conducted 3,762 deployments to 323 cities across the United States and abroad.

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312 COVID-19 studies published in CDC’s Morbidity and Mortality Weekly Report (MMWR)

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489+ million COVID-19 tests conducted by public and private laboratories

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7,693 Documents providing information and guidance for government agencies, businesses, and the public

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46.3+ million times people have used CDC’s online Coronavirus Self-Checker

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1.2+ million calls and emails to CDC-INFO

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78,000+ inquiries from doctors, nurses, or other clinical staff and health departments received by CDC

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3.7+ billion social media impressions on 14,891 CDC social media posts on the outbreak

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3.1+ billion times people viewed information on CDC websites

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191+ million people who have received at least one dose of a COVID-19 vaccine

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164+ million people who have been fully vaccinated with a COVID-19 vaccine