To clarify matters and help distinguish new or emerging COVID-19 threats from existing Omicron-based ones, WHO has updated its tracking system. Originally designed to simplify public communications by assigning Greek letters to those variants it considered threats, Omicron's rapid evolution has made it increasingly difficult for ordinary people to keep up with the dizzying array of subvariants it has spawned.Īlthough the emergence of new variants from previously circulating variants remains possible, Omicron viruses now account for more than 98% of publicly available sequences. The arrival of Omicron threw WHO's COVID-19 variant naming system into disarray. The World Health Organization (WHO) has updated its variant tracking system to help distinguish new COVID-19 threats from existing ones – and XBB1.5 is now the only Omicron variant "under investigation". WHO has simplified its variant labelling system, but stresses that Omicron remains a public health threat. Omicron Soup: Deciphering WHO’s new COVID-19 labelling system If you would like to republish this article, please follow these steps: use the HTML below do not edit the text include the author’s byline credit VaccinesWork as the original source and include the page view counter script.
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