Genomic Surveillance for SARS-CoV-2 Variants: Predominance of the Delta (B.1.617.2) and Omicron (B.1.1.529) Variants - United States, June 2021-January 2022

Published on February 10, 2022

This report describes genomic surveillance sequencing of COVID-19 variants by jurisdiction.

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EARLY RELEASE: Clinical Characteristics and Outcomes Among Adults Hospitalized with Laboratory-Confirmed SARS-CoV-2 Infection During Periods of B.1.617.2 (Delta) and B.1.1.529 (Omicron) Variant Predominance - One Hospital, California, July 15-September...

February 4, 2022
This report describes how COVID-19 vaccinations and booster doses were associated with lower chances of ICU admission for hospitalized SARS-CoV-2 infected adults during Omicron predominance.

EARLY RELEASE: Waning 2-Dose and 3-Dose Effectiveness 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 Netwo...

February 11, 2022
This report describes how vaccine effectiveness against COVID-19-associated emergency department/urgent care visits and hospitalizations was higher after the third dose but decreased with time.