When the CDC updated its variant prevalence estimates this week, the agency added new versions of Omicron to the dashboard. In the U.S., COVID-19 cases are now driven by: BA.5, BA.4.6, BQ.1, BQ.1.1, BF.7, BA.2.75, and BA.2.75.2. And possibly more subvariants that we aren’t tracking yet.
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Officially-reported COVID-19 cases are still on the decline nationwide this week, as are newly hospitalized patients (a more reliable metric). About 4,400 people with COVID-19 were admitted to hospitals across the country, compared to over 6,000 a day in late July. But wastewater data are suggesting a potential new surge.
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BA.2.75, a newer subvariant that evolved from BA.2, has been driving increased coronavirus transmission in some other countries recently. This lineage has yet to be identified in large numbers in the U.S., but I was inspired by a recent reader question to share what we’ve learned about it since my previous post in July.
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As if BA.4 and BA.5 aren’t already enough to worry about: some COVID-19 experts are sounding the alarm about BA.2.75, a new version of Omicron that evolved out of BA.2.
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