Deadline reports: 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. …
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