The XFG COVID-19 variant, aka "Stratus," is spreading rapidly in the U.S. as cases climb. Here's what to know about symptoms ...

Lower right back pain can stem from spine, muscle, or internal organ problems. Depending on the cause, the pain can be sharp, ...

The Stratus variant, also known as XFG, has been slowly creeping up in some parts of the UK - and it has certain symptoms ...

It's called the XFG variant, but it's better known as "Stratus." That's the name of the latest COVID-19 strain going around. Variant XFG, colloquially known as "Stratus," was first detected in ...

Don't confuse all back pain to stem from musculoskeletal issues, as some can also originate from kidney problems. Urologist ...