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 know about symptoms and vaccines.

Sharp throat pain that feels like swallowing razor blades—this symptom is particularly noticeable in infections with the new ...

Once again, a new strain of COVID has hit the country, and that includes the state of Massachusetts. According to the Centers ...