Science Briefs
SARS-CoV-2 Transmission
Scientific Brief: SARS-CoV-2 Transmission
SARS-CoV-2 is transmitted by exposure to infectious respiratory fluids, most commonly by people inhaling very small respiratory droplets. The risk of becoming infected with SARS-CoV-2 varies according to the amount of virus to which a person is exposed, distance from the source, and ventilation in the space.
May 7, 2021
Updated: Use of Cloth Masks
Community Use of Cloth Masks to Control the Spread of SARS-CoV-2
May 7, 2021
Surface Transmission
SARS-CoV-2 and Surface (Fomite) Transmission for Indoor Community Environments
April 5, 2021
Updated: Underlying Medical Conditions
Scientific Evidence for Conditions that Increase Risk of Severe Illness
March 29, 2021
Updated: Recommendations for Fully Vaccinated People
Background Rationale and Evidence for Public Health Recommendations for Fully Vaccinated People
April 2, 2021
Options to Reduce Quarantine
December 2, 2020
CDC's Science Agenda for COVID-19
Learn more about the high-level framework for planning and prioritization of COVID-19 work.