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What to Know About the Newest, Most Contagious Omicron Subvariants

It only took about a month for BA.2.12.1, an Omicron subvariant, to cause most of the new COVID-19 cases in the U.S. since scientists first spotted it in the country. But even newer iterations of the Omicron variant are spreading rapidly through the U.S. and are poised to outcompete past versions […]

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