Here’s what to know about symptoms and treatment, as well as how to reduce your risk of infection. There have been an unusually high number of norovirus outbreaks sickening people across the country this month, according to data from the Centers for Disease Control and Prevention.
There were 91 suspected or confirmed norovirus outbreaks in the first week of December, the most recent data available. This is a higher number than the C.D.C. has recorded during the same week in recent years. It also exceeds the number of outbreaks recorded in early December in the years leading up to the Covid-19 pandemic.