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Science Briefs

Science Briefs
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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: 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

Updated: Transmission in Schools

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

March 19, 2021


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.