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.

A new Covid-19 variant, Stratus (XFG or XFG.3), also known as “Frankenstein” due to its recombinant nature, has been ...

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 ...

COVID-19 cases are rising in half of US states. Is this the start of a summer wave? What to know about COVID trends and the ...

A rapid rise in Covid cases in Ireland is being linked to the fast spreading XFG variant, also called Stratus, which brings ...

“One of the most noticeable symptoms of the Stratus variant is hoarseness, which includes a scratchy or raspy voice," ...

Ireland is witnessing a surge in Covid cases, attributed to a new variant with subtle symptoms that might easily be missed.

A new COVID-19 variant named "Nimbus" has been detected in the U.S. and is spreading rapidly. Here's what to know about symptoms and vaccines.

Most of the new cases in South Africa have been among people in their 20s and 30s, and doctors note that age group generally has milder symptoms of COVID-19 in any case.

The CDC has detected a new set of COVID-19 variants called FLiRT. Here's what to know about the symptoms and the possibility of a summer surge.

Coronavirus or covid-19 symptoms range from mild to severe. They’re most likely to be similar to a regular cold, the flu or seasonal allergies.