Important update: Healthcare facilities
CDC has updated select ways to operate healthcare systems effectively in response to COVID-19 vaccination.
Learn more
Find the latest information:
Aquatics FAQs
Recommendations for Fully Vaccinated People
COVID-19 Homepage
Aquatics FAQs
Recommendations for Fully Vaccinated People
COVID-19 Homepage
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.
Science and Research
Science and Research
COVID-19 by County
COVID-19 Community Levels help individuals and communities decide what prevention steps to take based on hospitalizations and cases.
CDC's Science Agenda for COVID-19
Learn more about the high-level framework for planning and prioritization of COVID-19 work.
Science Updates
Brief summaries of new COVID-19 studies on many topics
Data and Surveillance
Weekly Data Tracker summaries, forecasting, and monitoring of cases and variants
Science Briefs
Science briefs on new and emerging topics
Recent CDC Articles
- Seroprevalence of Infection-Induced SARS-CoV-2 Antibodies — United States, September 2021–February 2022
- Provisional COVID-19 Age-Adjusted Death Rates, by Race and Ethnicity — United States, 2020–2021
- Provisional Mortality Data — United States, 2021
- Hospitalizations of Children Aged 5–11 Years with Laboratory-Confirmed COVID-19 — COVID-NET, 14 States, March 2020–February 2022
- Effectiveness of COVID-19 mRNA Vaccination in Preventing COVID-19–Associated Hospitalization Among Adults with Previous SARS-CoV-2 Infection — United States, June 2021–February 2022
- COVID-19 Mortality and Vaccine Coverage — Hong Kong Special Administrative Region, China, January 6, 2022–March 21, 2022
- Notes from the Field: SARS-CoV-2 Omicron Variant Infection in 10 Persons Within 90 Days of Previous SARS-CoV-2 Delta Variant Infection — Four States, October 2021–January 2022
Journals and Studies
Archived Content
To find a list of content that has been archived for historical purposes, please visit our archive. Please note the content of these pages and files may be out of date as they are no longer being updated. View Archive.