New COVID-19 variant XE identified: What to know and why experts say not to be alarmed

experts say that recombinant variants are very common and often crop up and disappear on their own.

An early indication from the U.K. suggests XE could be slightly more transmissible than BA.2, but the World Health Organization said more research is needed. Brownstein said there are still a lot of unanswered questions surrounding XE, but that -- in the U.S. -- there is a high level of protection both from vaccines and from natural immunity during the omicron wave."It's possible it may be more transmissible, but that doesn't necessarily mean it's more severe," he said.

"The U.K. has done a phenomenal job of sequencing a large number of cases, doing analyses and producing the output of that work," he said. "So you could see the identification of XE actually as a positive because it shows that our public health systems are working, identifying new variants even when the case numbers are super small."

PHOTO: A fan is swabbed at the COVID-19 testing site prior to attending the opening night game of the Tomlin UNITED Tour on March 29, 2022 in San Diego, Calif.

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