Outbreaks of the highly contagious stomach virus are more than double what they were last year at the time, CDC says. Protect yourself by washing hands with soap often — antibacterial gel doesn't work well against the virus.

Below we share the causes, signs and preventive tips for norovirus. By following these tips, you can significantly reduce the risk of contracting or spreading norovirus.

A sharp increase in norovirus cases is sweeping the United States, according to the latest data from the Centers for Disease Control and Prevention (CDC). Often called the

There were 91 outbreaks reported during a week in December — more than double what was seen in previous years, the CDC says.

Norovirus is raging in the United States this winter. According to the latest data from the Centers for Disease Control and Prevention, there were 91 outbreaks reported by state health departments the week of Dec. 5, the most cases seen at this time of year since 2012.

The number of national norovirus outbreaks was the highest seen in December since at least 2012. Experts suggest increased hand-washing to avoid catching the ultra-contagious stomach bug.