COVID-19 Cases In the US: The United States has lately seen an alarming rise in COVID-19 cases linked to a new variant, which has become the third-most common strain of the summer. The new XFG variant, colloquially known as "Stratus," is rapidly spreading across the US. This variant has also been found in many European countries.

COVID-19 cases are rising again in the United States, and the "stratus" variant might be to blame. The big picture: A summer outbreak of COVID-19 cases isn't a shocker. But it's arriving before children head back to school,

COVID-19 variant XFG accounted for 0% of U.S. cases in May. By late June it became the third-most common strain as COVID estimated to be growing in PA

One COVID variant, ‘Stratus’, that has become increasingly popular in the United States during this summer and is being widely monitored by health professionals. Known officially as XFG, the variant was first detected in Southeast Asia back in January.