A new COVID variant has been reported in China, which could lead to another round of COVID booster shots in America.

Less than 20 cases of the new COVID-19 variant, NB.1.8.1, had been reported in the U.S., as of Tuesday, May 27.

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The variant is officially named XFG but is being called Stratus. It was first found in Southeast Asia in January, and at the time was 0% of cases in the U.S., but by the end of June, it was about 14% ...

HONG KONG -- China is facing its worst COVID crisis since early 2020, when the world first witnessed an entire population locked down to contain the coronavirus in Wuhan and its surrounding province.

Add Yahoo as a preferred source to see more of our stories on Google. Some people in China are reporting severe sore throat with COVID infections right now. apomares via Getty Images A positive ...

Covid-19 was never just another cold. We knew it was going to stick around and keep changing to try to get the upper hand on our immune systems. But we've changed, too. Our B cells and T cells, ...