the cdc says 106 passengers and six crew members aboard the celebrity infinity cruise ship were sickened by the gastrointestinal illness norovirus .
staff on the infinity stepped up cleaning and disinfection in response to the outbreak , according to the health agency .
the ship was on its journey from march 29 to april 13 .
symptoms of norovirus include vomiting , diarrhea , fever and body aches . according to the cdc , most people recover within three days .
celebrity cruises said in a statement that over-the-counter medication was administered on board .
the ship previously experienced gastrointestinal illness outbreaks in 2006 and 2013 .