CDC wastewater also shows the XFG variant — nicknamed stratus — is most common in the U.S. Stratus can cause a “razor blade” ...

The “Stratus” variant (XFG) was first identified in January in Southeast Asia. By June, it accounted for 14% of COVID cases ...

CDC wastewater also shows the XFG variant — nicknamed stratus — is most common in the U.S. Stratus can cause a “razor blade” ...

A new strain of Covid, with a unique symptom, is circulating in the UK, accounting for a high proportion of cases in England. The new strain, called Stratus, has two variants, XFG and XFG.3, with ...