Experts say the painful infection, spread to people from mosquitoes, can get to many countries if it finds the right hosts.

The variant, NB.1.8.1, has been identified as the cause of Covid-19 resurgence in China and several other Asian countries. Experts in Europe are predicting a possible increase in cases there.

COVID-19 infections are "growing or likely growing in 40 states," said the U.S. Centers for Disease Control and Prevention.

"Currently approved COVID-19 vaccines are expected to remain effective to this variant against symptomatic and severe disease." The new COVID-19 variant was first detected in China back in January.

COVID-19 trends also depend on the emergence and spread of new variants. The latest, including NB.1.8.1, are getting better ...

The new "Nimbus" strain, also known as COVID-19 NB 1.8.1, was first detected in China in January, and was classified as a variant "under monitoring" by the World Health Organization (WHO) in May.

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 ...

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 ...