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 ...

Nimbus can be used as another word for halo, which hearkens to the godlike appearance of these clouds. As in, you may be reporting an act of god on your insurance claim later.

In weather, "nimbus" is a type of cloud associated with heavy precipitation. In health, it's the nickname for a new strain of COVID-19 that recently became the disease's dominant variant in the U.S.