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Sep 1, 2023 · Except in rare cases, the original version of Omicron is no longer circulating—neither is the original strain of the SARS-CoV-2 virus and the early, more severe Alpha and Delta variants. But, as of early September 2023, CDC estimates showed a long list of circulating Omicron subvariants, including more than a dozen XBB strains.
- kathy.katella-cofrancesco@yale.edu
Sep 1, 2023 · By December of that year, Omicron was causing daily case numbers in the U.S. to skyrocket to over a million. In 2022, it had spawned a number of subvariants. In 2023, a new Omicron strain called EG.5 (nicknamed “Eris”) is the dominant strain in the U.S., and experts are monitoring another new strain called BA.2.86 (nicknamed “Pirola”).
- kathy.katella-cofrancesco@yale.edu
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Jan 8, 2024 · 6 min read. What to Know about the New COVID Variant JN.1. A new variant of the COVID-causing virus SARS-CoV-2 is behind the latest surge in infections this winter, but it doesn't appear to...
- What Do We Know About Ba.2 Right Now?
- Why Is Ba.2 Considered A Subvariant?
- How Different Is Ba.2 from The Original Omicron Variant?
- How Transmissible Is It?
BA.2 is currently present in many countries. According to Denmark’s governmental research institute, Statens Serum Institut, BA.2 accounted for almost half of all Danish Omicron cases. “Last week in Denmark, BA.2 was about 60% of the cases, they also have BA.1 but it looks like BA.2 is replacing BA.1,” Luban said. “We’re also seeing presence at hig...
BA.2 is a descendant of the original Omicron variant. Since BA.2 shares a common lineage to BA.1, it is currently considered a subvariant, according to Luban. Other experts support this, including Sri Banerjee, MD, PhD, a faculty member in Walden University’s PhD in Public Health Program, who told Verywell in an email it’s about the similarities in...
According to the WHO, while Omicron and BA.2 are considered closer to each other than other viruses (such as Alpha, Delta, and Gamma), they are still different from each other in important ways. There are differences in some mutations, including in the spike protein, which affects how easily strains can be differentiated. Kuritzkes stated BA.2 shar...
Based on recent datafrom Denmark, the subvariant has spread rapidly. Health officials say more information is needed at this time before determining the transmissibility of BA.2. “BA.2 is 1.5 times more infectious than the original Omicron but does not seem to be causing an increase in hospitalizations in Denmark,” Banerjee said. “However, the high...
Dec 1, 2021 · The Omicron variant has a large number of mutations and is more transmissible than Delta. There's an increased risk of reinfection or breakthrough infections. Omicron is less likely to cause severe illness than Delta. The Omicron variant has a number of lineages and sub-lineages, with the three most common being BA.2, BA.4, and BA.5. Delta variant:
Jan 5, 2023 · These variants are Alpha (B.1.1.7), Beta (B.1.351), Gamma (P.1), Delta (B.1.617.2), and a novel or new variant, Omicron (B.1.1.529), which has a much faster infection rate than the other four variants do . A new variant’s threat depends on three main factors and their interactions.
Apr 19, 2024 · A booster shot gives a “boost” to the recipient's existing immunity from a previous vaccination. Updated vaccines are different in that they are expected to provide protection against currently circulating variants, helping the body build a new response to those variants.
