In many parts of the country, COVID cases are rising — but the tracking data isn't as reliable as it once was. ljubaphoto via ...

Infections of COVID-19 are growing or likely growing in half of the U.S. as of July 8, according to CDC estimates.

Cases of COVID-19 are now likely growing in 25 states, according to estimates published by the Centers for Disease Control ...

A contagious new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now dominant in the United States, CDC data show. What to ...

Variant NB.1.8.1 accounted for 0% of U.S. cases in April. By mid-June, it was estimated to be the cause of around 37% of cases.

As the world adapts to living with coronavirus, one common question persists: How long does Covid-19 last? Typically, the ...