A summer wave also could occur in the United States. According to the US Centers for Disease Control and Prevention, NB.1.8.1 already represents about one-third of new Covid-19 cases as of June 7.

COVID-19's latest variant, NB.1.8.1, or Nimbus, is spreading at a rapid rate across the U.S. and could impact people in Hampton Roads this summer.

PORTSMOUTH, Va. (WAVY) – COVID-19’s latest variant, NB.1.8.1, or Nimbus, is spreading at a rapid rate across the U.S. and could impact people in Hampton Roads this summer. This month, the ...

'The summer surge is real': President Biden has COVID, as experts say cases are on the rise across the US, including in Pa.