Less than 20 cases of the new COVID-19 variant, NB.1.8.1, had been reported in the U.S., as of Tuesday, May 27.

A new COVID-19 strain linked to a spike in cases in China has been detected in the U.S., but the CDC says it has seen so few ...

In mainland China, the portion of patients going to the ER with COVID has more than doubled in the last month.

A new Covid-19 variant, NB.1.81, initially detected in international travelers, has surfaced in the US, raising concerns ...

A new Covid-19 variant, NB.1.8.1, has surfaced in the US, following a surge in China, with cases detected in international ...

A case of NB.1.8.1, which has been linked to a COVID surge in China, was detected at the Seattle-Tacoma International Airport ...

As the Trump administration moves to limit COVID booster vaccines for some, here's what to know about the latest variant NB.1 ...