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 cases are rising in half of U.S. states. What to know about COVID trends and the new Stratus and Nimbus variants.

COVID-19 cases in California show a potential summer surge, with wastewater data indicating increased virus levels.

According to a Johns Hopkins report, several virological, behavioural, and environmental factors drive summer Covid-19 waves.

A summer wave of Covid-19 is hitting parts of the US, driven by the Nimbus variant. Here's what to know about symptoms, its ...

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.