That is more than double the 13.52% of tests coming back positive reached during the peak of last season's wave in March, according to data from public health laboratories around the country ...

That is more than double the 13.52% of tests coming back positive reached during the peak of last season's wave in March, according to data from public health laboratories around the country ...

Norovirus infections double last year's peak as new strain sweeps the U.S. More than 7 in 10 outbreaks have been linked to a new norovirus strain this season, according to the latest CDC figures.