SAN FRANCISCO (KGO) -- The R1 variant is the new strain of COVID-19 researchers are keeping a close eye on. The CDC identified "multiple spike protein mutations" in this variant. "The R.1 variant does ...

A new COVID-19 strain, referred to as NB.1.8.1 or "Nimbus," first appeared in the U.S. sometime near the end of April and is currently the dominant variant in the U.S. The new variant is said to be ...

The NB.1.8.1 COVID-19 variant is now the dominant strain in the U.S., exhibiting symptoms similar to previous variants, including a uniquely severe sore throat. The FDA updated warning labels for mRNA ...

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 ...

A new COVID-19 variant, XFG or “Stratus,” is on the rise in the United States, including in New Jersey. Symptoms of XFG are similar to other COVID-19 variants, and current vaccines are expected to ...

A new COVID-19 variant has reared its ugly head and is climbing the ranks in the United States. So much so that it’s become the third-most common strain of the summer. Variant XFG, also known as ...

The XFG variant of the severe acute respiratory syndrome coronavirus 2 as continued to spread as the U.S. heads into peak Summer travel season. (Photo by I RYU/VCG via Getty Images) There’s another ...

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% ...

As a new COVID-19 variant takes over in the U.S., guidance surrounding vaccines has become increasingly confusing. Changes in vaccination guidelines, ever-evolving variants and strains, along with ...