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  2. Overview. Nomenclature. Toggle Nomenclature subsection. Lineages and clades. Classification of variants. Reference sequence. Notability criteria. Variants of concern (WHO) Toggle Variants of concern (WHO) subsection. Omicron. BA. sublineages. Further sublineages emerging in 2022.

  3. Dec 18, 2023 · Tracking SARS-CoV-2-variants. Working definitions and primary actions. Currently circulating COVID-19 Variants of Interest (VOIs) as of 18 December 2023. Currently circulating COVID-19 Variants under Monitoring (VUMs) as of 10 February 2024.

  4. Nov 4, 2023 · The main variant in the United States is omicron. This variant spreads more easily than the original virus that causes COVID-19 and the delta variant. But omicron seems to cause less severe disease. Omicron has a few major offshoots, also called sublineages. Together the omicron variants make up nearly all COVID-19 infections in the United States.

  5. Current Variants in the United States. Estimated prevalence as of May 21, 2022. Omicron BA.2.12.1. 57.9% Omicron BA.2. 39.1% Others. Source: Centers for Disease Control and Prevention. · BA.4 and...

  6. Nov 20, 2023 · What are variants of SARS-COV-2, the virus that causes COVID-19? It is usual for viruses to change and evolve as they spread between people over time. When these changes become significantly different to a previously detected virus, these new virus types are known as “variants.”

  7. Jun 14, 2022 · How bad are Covid cases caused by Omicron? Is Covid caused by Omicron still treatable? What is the Omicron variant? First identified in Botswana and South Africa in November 2021, the...

  8. Variants of the Virus. About Genomic Surveillance. Data & Sequencing. Variant Proportions in the US. Global Variant Data. Sequencing for SARS-CoV-2 (SPHERES) Published COVID-19 Sequences. About Variants. Many viruses are constantly changing, including the virus that causes COVID-19.

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