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Delta (B.617.2) First identified in India in late 2020, the delta variant soon spread across the globe. It became the dominant variant of SARS-CoV-2 until the emergence of omicron in December 2021.
BA.2.86 has more than 30 mutations compared to the omicron XBB.1.5 variant, the dominant strain for most of 2023 and the variant targeted in the updated COVID-19 vaccine, TODAY.com previously ...
The new boosters have been reformulated to target omicron XBB.1.5, which was the dominant COVID variant for most of 2023. While XBB.1.5 has since been overtaken by HV.1 and other variants, it is ...
Here’s the latest on new variants, updated vaccines, and masking ... Omicron appeared in late 2021 and was the last variant to mutate enough to significantly escape immunity from the original ...
The CDC and WHO assessed that the "public health risk posed by this variant is low compared with other circulating variants". [23] Moderna and Pfizer have stated that their COVID-19 vaccines targeted at the omicron variant remain effective against BA.2.86 [ 24 ] and Novavax has stated its updated protein-based COVID-19 vaccine appears effective ...
State health officials estimated the latest variant to be 23 to 27% more transmissible than BA.2, which itself was more transmissible than the original omicron variant. However, there’s ...
Omicron (B.1.1.529) is a variant of SARS-CoV-2 first reported to the World Health Organization (WHO) by the Network for Genomics Surveillance in South Africa on 24 November 2021.
The Omicron variant features as such for the first time in the overview of WHO's weekly operational update, namely "Supporting Omicron variant detection and COVID-19 response in southern Africa." As of 2 December, Botswana and South Africa have reported 19 and 172 Omicron variant cases, respectively, accounting for 62% of global cases.