"As these viruses continue to evolve, public health officials watch carefully to see whether new strains will be more easily ...

Add Yahoo as a preferred source to see more of our stories on Google. (NewsNation) — As the weather begins to change and respiratory illnesses become more common, a highly transmissible strain of ...

A new COVID-19 variant is climbing the ranks in the United States, becoming the third-most common strain of the summer. Variant XFG, colloquially known as "Stratus," was first detected in Southeast ...

Add Yahoo as a preferred source to see more of our stories on Google. A new COVID variant known as NB.1.8.1 has made landfall in the United States. As of late May, the variant, which was first ...

COVID-19 cases were relatively low across the country for most of the summer, but they’re now creeping up again. Data shows that this is thanks to the new COVID-19 variant XFG, nicknamed Stratus, ...

As summer comes to an end, COVID-19 cases are on the rise again in California. While respiratory viruses usually peak in the winter, the novel coronavirus can also surge in the warmer months.

A new COVID-19 variant sweeping through China has yet to make a sizable footprint in the U.S., the Centers for Disease Control and Prevention (CDC) says. In January, a new COVID-19 variant known as NB ...

The variant is officially named XFG but is being called Stratus. It was first found in Southeast Asia in January, and at the time was 0% of cases in the U.S., but by the end of June, it was about 14% ...