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Jan 6, 2023 · We don’t have firm numbers yet, but based on what we know about the XBB variants, someone who has been infected with an earlier omicron variant is likely susceptible to reinfection with XBB.1.5. This is for two reasons: The XBB.1.5 variant is more immune-evasive, and a person’s immune response naturally decreases over time following infection.
Sep 1, 2023 · According to the CDC, the Omicron variant spreads more easily than the original SARS-CoV-2 virus and Delta, an early variant. Omicron caused an alarming spike in COVID-19 cases in South Africa—they went from 300 a day in mid-November 2021 to 3,000 a day at the end of that month. The second question has been whether Omicron and its subvariants ...
- kathy.katella-cofrancesco@yale.edu
Dec 19, 2023 · BA.2.86 comes from the BA.2 lineage and is a subvariant of Omicron, which dominated COVID-19 cases two years ago and has mutated into different subvariants. It features more than 30 mutations compared to the XBB.1.5 Omicron subvariant, which was the dominant strain for most of 2023. And there is only one change between JN.1 and BA.2.86 in the ...
May 3, 2022 · The original omicron variant was called B.1.1.529. The initial omicron variant begat such subvariants as BA.1; BA.1.1; BA.2; BA.2.12.1; BA.3; and the most recent, BA.4; and BA.5. “They all ...
Aug 17, 2023 · In January of 2023, a new Omicron variant called XBB.1.16 was reported and labeled as “one to watch” by the WHO. Omicron variants seem to cause less serious illness than earlier types of this ...
Feb 10, 2023 · XBB.1.5 was first identified in the United States in New York in October 2022. Both XBB and the Kraken version (XBB.1.5) are recombinant (or hybrid) virus subvariants, meaning they are made up of two strains—in this case, two offshoots of the Omicron BA.2 sublineage. It is believed that both strains infected one person and mixed to form the ...
