A COVID-19 strain with the nickname of "nimbus" has become the dominant variant of that disease in the U.S. but hasn't yet ...

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 ...

The variant, called NB.1.8.1 or "Nimbus," did show up in the U.S. until May. But now, health officials estimate it makes up about 37% of current COVID-19 cases, according to the Centers for ...