Josh Einiger has the latest on the omicron variant including the new mask advisory issued in New York City.

As omicron cases are starting to tick up nationwide, the lawsuits continue against New York City's vaccine mandates.

Stratus is similar in symptoms and seriousness to other Omicron variants, but it may present a never-before-seen symptom: hoarseness.

Phil Murphy announced that the New Jersey Department of Health has identified a case of the omicron variant in a traveler to the state.

The XFG COVID-19 variant, aka "Stratus," is spreading rapidly in the U.S. as cases climb. Here's what to know about symptoms ...

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 variant XFG accounted for 0% of U.S. cases in May. By late-June, it became the third-most common strain.

ATUM in Newark was the biotech lab that key researchers turned to when the delta variant emerged. Now there's urgent demand to get the omicron DNA.