Norovirus, sometimes called the “winter vomiting disease” or “two-bucket disease” —because it causes both vomiting and diarrhea — is on the rise across the nation, even as seasonal flu is taking off and walking pneumonia rages on. 

Wastewater data and reports from the Centers of Disease Control and Prevention have shown a significant spike in norovirus in the last few weeks, with rates far exceeding those of the past few years. 

At least 91 outbreaks were reported the week of…