A new COVID-19 strain has been reported in dozens of countries, including the U.S. Here's what you should know about it.

While COVID-19 transmission remains low in the US, health experts are anxious about the potential for a big summer wave as ...

A highly transmissible new COVID-19 variant called NB.1.8.1, aka "Nimbus," is spreading in the United States, CDC data show.

Vaccine makers will have to run large new trials before updated shots can be approved for everyone who is not at a higher-than-average risk.

The NB.1.8.1 COVID-19 variant was linked to a large surge of hospitalizations in parts of Asia earlier this year.

NB.1.8.1 — a new COVID-19 variant tied to a surge in China — now accounts for around 37% of cases in the U.S., according to variant proportion estimates from the CDC. Four notes: ...

COVID-19 is remains a public health concern five years after the start of the pandemic. What to know about vaccines, variants ...

In other developments, the ECDC today reported a slow rise in COVID activity in the Europe, which may partly reflect waning ...

COVID-19 appears to be on the rise in some parts of California as a new, highly contagious subvariant — featuring "razor ...

The World Health Organization (WHO) is keeping an eye on a new COVID-19 variant called NB.1.8.1, or “Nimbus,” that has spread ...

Health officials are tracking a new COVID-19 variant. This comes as confusion grows over vaccine recommendations moving ...

A new Covid variant has spread to the U.S., including in New York state.