New coronavirus variant in New York spurs caution, concern

NEW YORK (AP) — Another mutated version of the coronavirus has popped up in New York City, and experts reacted to the the news 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 the California Institute of Technology, 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 make copies of themselves.

“Most are not of particular concern,” said Francois Balloux, director of the University College London’s Genetics Institute.

However, he added, “Noticing them early, flagging them, raising concern is useful."

That's because some genetic tweaks can be worrisome, especially if they help the virus spread more easily, make it more deadly or curb the effectiveness of vaccines. Scientists use genome sequencing and other research to figure out which are a potential problem.

New York City health officials and Mayor Bill de Blasio on Thursday sought to tamp down worries about the new variant, emphasizing that the new research is preliminary and little is known about the variant.

“Some variants are just that, they’re variants.” said Dr. Jay Varma, senior health adviser to the mayor.

WHAT DID THEY FIND IN NEW YORK?

Two research groups — at Caltech and Columbia University in New York — released papers this week describing their findings about the new variant. Neither paper has been published or reviewed by other scientists.

The Caltech researchers found that the new variant showed up in about a quarter of the 1,200 virus sequences they looked at this month. The variant has also shown up...