Cases of a wretched stomach bug are surging in parts of the United States this winter, according to government data. The most recent numbers from the Centers for Disease Control and Prevention show there were 91 outbreaks of norovirus reported during the week of Dec.

The latest government data shows that cases of a fast-spreading stomach bug are surging in parts of the United States. The most recent numbers from the U.S.

But with 19 to 21 million illnesses each year in the United States, norovirus nevertheless causes on average 900 deaths and 109,000 hospitalizations annually, mostly among adults