The Centers for Disease Control and Prevention has launched an investigation into the fourth occurrence of norovirus (stomach flu) aboard a cruise ship. According to reports, the latest outbreak occurred on Holland America's MS Veendam cruise ship in mid-February.
Fourth outbreak this year
The CDC has reported that 114 passengers and 10 crew members said they began suffering symptoms of vomiting and diarrhea during the cruise liner's main voyage between Feb. 4 and Feb. 22. In all, the ship was carrying 1,273 passengers and 575 crew members.