Previous immunity may be ineffective against this new variant, nicknamed Cicada. A doctor explains what you need to know.

Add Yahoo as a preferred source to see more of our stories on Google. A new COVID-19 variant that was unheard of just months ago is now projected to be the second-most common strain in the United ...

The new variant has been detected in 25 states so far. d3sign via Getty Images A new variant of COVID-19 is spreading across the United States, according to public health officials. This version, ...

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 “cicada” SARS-CoV-2 variant, which earned its nickname after staying relatively dormant following its discovery in 2024, has accounted for a small proportion of COVID-19 cases since the CDC began ...

The new Covid variant is continuing to proliferate around the U.S. — although you might not know it by just checking federal variant-tracking dashboards. Known as NB.1.8.1, the omicron variant has ...

A new COVID-19 variant called NB.1.8.1 was first collected in China in January. As of May 27, less than 20 cases of the new variant had been reported in the U.S. Currently approved COVID-19 vaccines ...

A new COVID-19 variant that was unheard of just months ago is now projected to be the second-most common strain in the United States. Variant NB.1.8.1 was first detected in China in January but ...