EARLY RELEASE: Effectiveness of a Third Dose of mRNA Vaccines Against COVID-19-Associated Emergency Department and Urgent Care Encounters and Hospitalizations Among Adults During Periods of Delta and Omicron Variant Predominance - VISION Network, 10 St...

Published on January 21, 2022

This report describes COVID-19 vaccine effectiveness time frames among people who received their first and second doses of the vaccine series, and effectiveness of third vaccine doses during both Delta- and Omicron-predominant periods.

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EARLY RELEASE: Trends in Disease Severity and Health Care Utilization During the Early Omicron Variant Period Compared with Previous SARS-CoV-2 High Transmission Periods - United States, December 2020-January 2022

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