The World Health Organization has classified XFG as a “variant under monitoring,” but there are no signs of greater disease severity associated with the new strain.

COVID-19 cases are rising in half of U.S. states. What to know about COVID trends and the new Stratus and Nimbus variants.

XFG (Stratus) is the latest subvariant of Omicron that is gaining momentum in the summer surge of the pandemic. However, ...

Dr. Francisco Durán García, head of Epidemiology at Cuba's Ministry of Public Health, addressed the nation's epidemiological landscape on Wednesday, ...

Scientists are closely monitoring the rapid global spread of two new Omicron subvariants, Nimbus (NB.1.8.1) and Stratus (XFG) ...

Covid-19 cases are rising again in 25 US states, driven by new variants like NB.1.8.1 (Nimbus) and XFG (Stratus). Experts ...