Variant XFG, colloquially known as "Stratus," was first detected in Southeast Asia in January but accounted for less than ...

The variant XFG, better known as "Stratus," has surged to become the third-most dominant strain this summer, accounting for ...

Variant XFG, more commonly referred to as "Stratus," has become the third-most common strain of the summer after making up 14% of cases in the United States by late June, according to the Centers for ...

The US is experiencing a summer surge in COVID-19 cases, with infections rising in 40 states, particularly in the South and ...