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.

Covid has caused serious amounts of chronic illness. Research advances may help not only people facing chronic illnesses ...

Records show that a top U.S. regulator rejected the recommendations of agency experts and limited the use of Covid vaccines.