In the last month, the XFG variant has driven an increasing proportion of cases. As of Aug. 13, Stratus is now the ...

The CDC remarks the new COVID-19 variant Stratus XFG as the third most common variant circulating in the United States.

COVID-19 cases are rising again in the United States, and the "stratus" variant might be to blame. The big picture: A summer ...

Covid-19 cases in the US are increasing, with the highest activity reported in western states including Alaska, California, ...