Between March 6 and March 12, BA.2 accounted for an estimated 23.1% of new coronavirus cases in the country, Live Science previously reported. BA.1 was primarily responsible for the winter surge in COVID-19 cases, but cases of BA.2 have since increased dramatically in Europe and are beginning to rise in the U.S.
As of mid-March 2022, omicron is the dominant coronavirus variant in the world, accounting for 99.9% of coronavirus genome sequences from recent COVID-19 cases in the global database GISAID, according to WHO.Īt the beginning of December 2021, researchers spotted another version of omicron, and proposed splitting the omicron lineage into two sublineages: BA.1, the version initially found in Africa, and BA.2, for the newfound version. Where is it now? Omicron quickly spread around the world, causing a surge of COVID-19 cases in December 2021 and January 2022. As such, the alpha, beta and gamma variants were designated as "previously circling VOCs," and delta and omicron were designated as "currently circling VOCs." In addition, the VOIs named lambda and mu were designated as "previously circulating VOIs, according to WHO. And in March 2022, WHO officials said that variants would be further designed as "currently circulating" or "previously circulating," according to the WHO report. For example, the variants named eta, iota and kappa were once considered VOIs, but that label has since been removed and those variants are no longer being monitored, according to WHO. Officials use the term "variant of concern," or VOC, once reliable data show that the variant has increased transmissibility - such as what's been seen with the omicron variant - or other worrisome features, such as the ability to evade vaccines or cause more severe disease, as was the case with delta, Live Science previously reported.īut the VOI or VOC labels can be removed if evidence shows that a variant no longer poses a major risk to public health compared with other variants, or they aren't circulating at significant levels, according to WHO. In particular, a "variant of interest," according to WHO, is a variant that is increasing in prevalence in multiple areas and has mutations that are likely to affect viral characteristics, such as transmissibility or disease severity. The results of the study, published in the Journal of Growing Microbes and Infections, indicate that a single dose of the vaccine does not provide adequate protection because its efficacy does not exceed 31.8%.Viruses mutate all the time, so these new variations have not been surprising however, when a modified version becomes a dominant strain in a region or one with worrisome features, public health experts name and follow those versions. Researchers at the Guangzhou Center for Disease Control and Prevention, led by renowned Chinese epidemiologist “Zhang Nanshan”, found that two-dose vaccines provide 59% efficacy against the virus caused by the “delta” strain, and 70.2% against mild cases of infection and 100% against critical conditions. Meanwhile, a study showed it Corona vaccines The defect created by China has limited the spread of the Indian “delta” strain, according to the Chinese Xinhua News Agency, during a strain in the southern Chinese city of Guangzhou last May. Inactivated corona vaccines developed by China control the spread of the Indian “delta” strain The researchers added that the antibody to SARS2-38 could fight the common strains of the corona virus: “alpha”, “beta”, “gamma”, “delta”, “kappa” and “ioda”, as well as rare mutations.Ĭonsidering the risk of new mutations in the future, the researchers explained the need for effective antibodies that can support the body’s immune system independently and in combination with treatment. Tested, and selected the most effective one.
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Louis said in a study published on the university’s official website that they had studied 43 samples and analyzed how to prevent infection with the original variant of the virus and then 9 strong antibodies.
Researchers at the University of Washington School of Medicine in St.
scientists have announced the identification of an antibody that can eliminate all known mutations in the growing corona virus “Govit 19”, according to the Russian “Russia Today” news network.