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As of 7 December 2021 it was known that BA.2, unlike BA.1, lacks the characteristic S-gene target failure (SGTF) causing deletion (Δ69-70), by which many qPCR tests have been able to rapidly detect a case as an Omicron (or Alpha) variant, from the previously dominant Delta variant.
This timeline of the SARS-CoV-2 Omicron variant (November 2021 – February 2022) is a dynamic list, and as such may never satisfy criteria of completeness. Some events may only be fully understood and/or discovered in retrospect.
Omicron (BA.1, EG.5, BA.2.86) Omicron was the predominant variant circulating in the U.S. between late 2021 and 2023. It was first identified in late 2021 in Botswana and South Africa and quickly ...
On January 6, the Centers for Disease Control and Prevention (CDC) announced that it had found at least 52 confirmed cases of the more contagious SARS-CoV-2 variant: 26 in California, 22 in Florida, two in Colorado, and one each in Georgia and New York. The agency also stressed that there could already be more cases in the country.
Omicron appeared in late 2021 and was the last variant to mutate enough to significantly escape immunity from the original strain and vaccines tailored to it. Since then, the variant mutations ...
The Omicron variant of the coronavirus is spreading faster than the Delta variant and is causing infections in people already vaccinated or who have recovered from the COVID-19 disease, the head ...
The Omicron variant, known as lineage B.1.1.529, was declared a variant of concern by the World Health Organization on 26 November 2021. [202] The variant has a large number of mutations, of which some are concerning. Some evidence shows that this variant has an increased risk of reinfection. Studies are underway to evaluate the exact impact on ...
December 5, 2021 at 10:23 AM. WASHINGTON (Reuters) -The Omicron variant of the coronavirus has been found in about 15 U.S. states so far, but the Delta variant remains the majority of COVID-19 ...
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