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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. The extensive mutations of its spike proteins make for the Omicron variant.
KP.3.1.1 is still the dominant COVID-19 variant in the United States as it accounts for nearly 60% of positive cases, but the new XEC variant is not far behind, recent Centers for Disease Control ...
BA.1 has itself been divided in two, the original BA.1 and BA.1.1 (or B.1.1.529.1.1) where the main difference is that the latter has a R346K mutation. [ 137 ] Standard PCR and rapid tests continue to detect all Omicron subvariants as COVID-19, but further tests are necessary to distinguish the subvariants from each other and from other COVID ...
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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 ...
It’s not yet clear, but some early data suggests people might become contagious sooner than with earlier variants — possibly within a day after infection. The U.S. Centers for Disease Control ...
January 22. On January 22, the U.S. passed 25 million cases, with one of every 13 Americans testing positive for COVID-19. [24] January 24. On January 24, the Capitol Police announced that 38 police officers have tested positive for COVID-19 since the January 6 riot at the United States Capitol. [25] January 25.
The risk of reinfection with the Omicron coronavirus variant is more than five times higher and it has shown no sign of being milder than Delta, a study showed, as cases soar across Europe and ...