Updated: Vaccines and Vaccinations
Studies published since the last update that demonstrate currently approved and authorized mRNA vaccines provide protection against variants of concern, including the Delta strain that is now predominant in the United States. Vaccine effectiveness against hospitalization and death is high for all current SARS-CoV-2 variants; emerging data suggest lower effectiveness against confirmed infection and symptomatic disease caused by the Beta, Gamma, and Delta variants compared with the ancestral strain and the Alpha variant.
September 15, 2021
Updated: Transmission in Schools
Globally, K-12 schools and early care and education (ECE) programs used various, layered COVID-19 prevention strategies with in-person, hybrid, and virtual models of instruction and care during the 2020-2021 academic year. Their experiences have contributed to our knowledge of the nature of SARS-CoV-2 transmission in schools, ECE programs, and their surrounding communities.
July 8, 2021
Vaccines and Vaccinations
May 27, 2021
Updated: SARS-CoV-2 Transmission
May 7, 2021
Updated: Use of Cloth Masks
May 7, 2021
April 5, 2021
Updated: Underlying Medical Conditions
March 29, 2021
Jan. 28, 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.