A little over a month after the more transmissible BA.2.12.1 Omicron subvariant became officially dominant in the U.S. on May 24, two sister subvariants of Omicron have quickly eclipsed BA.2.12.1 across the country.
BA.5 and BA.4 are, like BA.2.12.1, more transmissible, but have the added advantage of reportedly being more able to reinfect those who’ve already had Covid.
“We now report findings from a systematic antigenic analysis of these surging Omicron subvariants,” says a paper published last month to the BioRxiv preprint server.
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The Omicron subvariants known as BA.4 and BA.5 have together become dominant among new U.S. coronavirus cases, the CDC estimates.https://t.co/5GJ9wTfck0
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