After its January debut, XFG climbed to number three on the CDC COVID variant list by late June, accounting for an estimated ...

Scientists are currently studying how well people are protected against severe disease from XFG. Researchers conducted lab studies using human cells and a "pseudovirus" stand-in for XFG, as well as ...

COVID-19 is surging again, indicated by rising wastewater levels and infections across many states. A new variant, Stratus ...