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SARS-CoV-2 B.1.1.529 (Omicron) Variants — U.S. December 1–8, 2021
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December 10, 2021
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Source: MMWR: Morbidity and Mortality Weekly Report 2021; v. 70 Early Release
[PDF-246.49 KB]
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Description:What is already known about this topic? SARS-CoV-2 Variants B.1.1.529 (Omicron), first reported to WHO on November 24, 2021, has been designated a Variants of concern. Mutations in Omicron might increase transmissibility, confer resistance to therapeutics, or partially escape infection- or vaccine-induced immunity.
What is added by this report? During December 1–8, 2021, 22 U.S. states reported at least one COVID-19 case attributed to the Omicron Variants. Among 43 cases with initial follow-up, one hospitalization and no deaths were reported.
What are the implications for public health practice? Implementation of concurrent Prevention strategies, including vaccination, masking, improving ventilation, tTesting, quarantine, and isolation are recommended to slow Transmission of SARS-CoV-2, including Variantss such as Omicron, to protect against severe illness and death from COVID-19.
A new Variants of SARS-CoV-2 (the Virus that causes COVID-19), B.1.1.529 (Omicron) (1), was first reported to the World Health Organization (WHO) by South Africa on November 24, 2021. Omicron has numerous mutations with potential to increase transmissibility, confer resistance to therapeutics, or partially escape infection- or vaccine-induced immunity (2). On November 26, WHO designated B.1.1.529 as a Variants of concern (3), as did the U.S. SARS-CoV-2 Interagency Group (SIG)* on November 30. On December 1, the first case of COVID-19 attributed to the Omicron Variants was reported in the U.S. As of December 8, a total of 22 states had identified at least one Omicron Variants case, including some that indicate community Transmission. Among 43 cases with initial follow-up, one hospitalization and no deaths were reported. This report summarizes U.S. Surveillance for SARS-CoV-2 Variantss, characteristics of the initial persons investigated with COVID-19 attributed to the Omicron Variants and public health measures implemented to slow the spread of Omicron in the U.S. Implementation of concurrent Prevention strategies, including vaccination, masking, increasing ventilation, tTesting, quarantine, and isolation, are recommended to slow Transmission of SARS-CoV-2, including Variantss such as Omicron, and to protect against severe illness and death from COVID-19.
Suggested citation for this article: SARS-CoV-2 B.1.1.529 (Omicron) Variant — U.S. December 1–8, 2021. MMWR Morb Mortal Wkly Rep. ePub: 10 December 2021.
mm7050e1.htm?s_cid=mm7050e1_w
mm7050e1-H.pdf
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ISSN:0149-2195 (print);1545-861X (digital);
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Pages in Document:5 pdf pages
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Volume:70
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