What to know about XBB.1.16, the 'Arcturus' variant

What to know about XBB.1.16, the 'Arcturus' variant The subvariant accounts for nearly 10% of new Covid cases in the U.S. NBC News

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XBB.1.16 — dubbed “Arcturus” on social media — is another descendant of omicron. It was first detected in early January and the majority of cases have been seen in India so far. It’s been steadily rising in the U.S. in recent weeks, although it still made up slightly less than 10% of new confirmed Covid cases as of Saturday, according to the Centers for Disease Control and Prevention. 

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