Over 100 people fall ill in norovirus outbreak on cruise ship, US CDC reports

More than 100 people have fallen ill in a norovirus outbreak on board a Caribbean Princess cruise, according to the United States Centers for Disease Control and Prevention (CDC).

As of Thursday, 102 passengers and 13 crew members reported symptoms including diarrhea and vomiting, during the ship's voyage through the Caribbean from April 28 to May 11.

A total of 3,116 passengers and 1,131 crew members were on board, the CDC reported.

In response to the outbreak, the crew increased cleaning and disinfection procedures and isolated those who were ill. Stool specimens from gastrointestinal illness cases were also collected for testing, the CDC said.

Norovirus is a leading cause of acute gastroenteritis worldwide. Symptoms include acute onset nausea, diarrhea and vomiting, according to the World Health Organization.

Cruise ships, with crowded spaces and new environments for travelers, can become hotspots for illness. Infections often spread through contaminated food or water, or through contact with other passengers. It can also spread through touching surfaces in common areas and shared utensils.

To help limit the spread of the virus, the CDC advises passengers to wash their hands frequently, rest well and drink enough water. Passengers are also encouraged to report to a medical center once finding themselves ill.