IF YOU ARE FULLY VACCINATED
CDC has updated its guidance for people who are fully vaccinated. See Recommendations for Fully Vaccinated People.
IMPORTANT UPDATE FOR SCHOOLS
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

Science Briefs

Science Briefs
photo of gloved hand moving lab specimen

Vaccines and Vaccinations

Science Brief: COVID-19 Vaccines and Vaccination

The mRNA COVID-19 vaccines (Pfizer-BioNTech and Moderna) provide protection against a variety of strains. People who are fully vaccinated with an mRNA vaccine are less likely to have asymptomatic infection or to transmit SARS-CoV-2 to others.

May 27, 2021

Updated: SARS-CoV-2 Transmission

Scientific Brief: SARS-CoV-2 Transmission

May 7, 2021

Updated: Underlying Medical Conditions

Scientific Evidence for Conditions that Increase Risk of Severe Illness

March 29, 2021

Updated: Transmission in Schools

Transmission of SARS-CoV-2 in K-12 schools

March 19, 2021

Variants

Emerging SARS-CoV-2 Variants

Jan. 28, 2021

CDC's Science Agenda for COVID-19

Learn more about the high-level framework for planning and prioritization of COVID-19 work.