The CDC says a new strain of norovirus now makes up a majority of outbreaks and that could be why it's spreading so quickly. Stephanie Stahl reports.

If there’s one thing you don’t want to endure, it’s the symptoms of norovirus, a brutal stomach bug that tends to cause relentless diarrhea and vomiting for roughly one to three hellish days. And it may be especially difficult to avoid right now,

Outbreaks of the highly contagious stomach virus are more than double what they were last year, the Centers for Disease Control and Prevention says