Another mutated version of the coronavirus has popped up in New York, prompting experts to respond with a mixture of caution and concern.
The new variant first appeared in the New York area in late November and has since cropped up in neighboring states, according to researchers at Caltech, one of two teams to share their work this week.
But how problematic the variant may be isn’t known yet. Viruses are constantly mutating — or making typos in their genetic code — as they spread and…
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