New in MMWR: XBB-Related Omicron Variants

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January 25, 2023

EARLY RELEASE

The figure is a graphic explaining how an updated COVID-19 vaccine helped prevent illness from Omicron XBB-related variants. There’s an illustration of a phone with an appointment confirmation. The graphic includes text that says “Talk to your doctor about getting an updated COVID-19 vaccine if your last dose was before September 2022”.



Early Estimates of Bivalent mRNA Booster Dose Vaccine Effectiveness in Preventing Symptomatic SARS-CoV-2 Infection Attributable to Omicron BA.5– and XBB/XBB.1.5–Related Sublineages Among Immunocompetent Adults — Increasing Community Access to Testing Program, United States, December 2022–January 2023



The figure is a graphic showing an illustration of the SARS-CoV-2 virus in the background with text that reads “Researchers Use Faster Tool to Monitor the Rise and Impact of XBB-Related Omicron Variants; Read the latest MMWR reports to stay informed”.


Spike Gene Target Amplification in a Diagnostic Assay as a Marker for Public Health Monitoring of Emerging SARS-CoV-2 Variants — United States, November 2021–January 2023





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