Federal data shows COVID-19 is trending up in most states, with emergency department visits up among people of all ages.

A new strain of COVID-19 known as Stratus that is spreading worldwide has been detected in Arizona.

According to the Centers for Disease Control and Prevention, the strain is now the third most common COVID-19 variant in the ...

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