COVID-19 activity is rising in much of the country. Data shows overall respiratory virus spread is very low in the U.S.

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

Louisiana is among a group of states with the highest rate of COVID cases right now, according to new data from the Centers for Disease Control and Prevention. Why it matters: The "stratus" COVID ...

Scientists say this new $2 NasRED Test can detect COVID and Lyme Disease in just 15 minutes from a single droplet of blood.