7/31/2023 0 Comments Out there omega edition all ending![]() Severity: Scientists are still working to learn more about whether the current Omicron strains cause more severe disease than their predecessors. One explanation was that more than 30 of Omicron’s mutations are on the virus’s spike protein, the part that attaches to human cells, and several of those are believed to increase the probability of infection. The original strain of Omicron was more transmissible than Delta was. How contagious is it? Omicron’s subvariants are considered to be especially efficient spreaders of the disease, and while scientists are still learning about XBB.1.5, they say it is the most transmissible strain of the virus so far. They include BF.7, XBB, BN.1, BF.11, and others. Meanwhile, experts are still learning about several newer Omicron strains circulating in the U.S., each of which, as of mid-December, were causing less than 6% of infections. By January 2023, a new Omicron subvariant called XBB.1.5 was causing the most infections in the U.S. ![]() In 2022, it spawned a number of subvariants, including BA.5, BQ.1, and BQ.1.1. By December of that year, Omicron was causing daily case numbers in the U.S. The original Omicron strain (BA.1) was first identified in Botswana and South Africa in late November 2021, and cases quickly began to surface and multiply in other countries. Omicron and its subvariants have ranked as the predominant SARS CoV-2 strains in the U.S for over a year now. The World Health Organization (WHO) names new coronavirus variants using the letters of the Greek alphabet, starting with the Alpha variant, which emerged in 2020.īelow is a list of-and information about-some of the variants that have been top-of-mind. This is especially true if a new variant is more aggressive, highly transmissible, vaccine-resistant, able to cause more severe disease-or all of the above, compared with the original strain of the virus. Since the beginning of the pandemic, we’ve seen a number of prominent variants, including Alpha, Beta, Delta, and Omicron.Īlthough new variants are an expected part of the evolution of viruses, monitoring each one that surfaces is essential in ensuring we-in the U.S. One thing we know for sure about SARS-CoV-2, the virus that causes COVID-19, is that it is changing constantly. Because information about COVID-19 changes rapidly, we encourage you to visit the websites of the Centers for Disease Control & Prevention (CDC), World Health Organization (WHO), and your state and local government for the latest information. Note: Information in this article was accurate at the time of original publication. ![]()
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