Another cruise ship nightmare is making headlines and this time, more than 100 passengers and crew members reportedly fell ill aboard the Caribbean Princess during a norovirus outbreak.

Norovirus is a highly contagious virus that causes acute gastroenteritis, the inflammation of the stomach and intestines.

Often called the "stomach flu" or "stomach bug," it is unrelated to influenza. It causes sudden, severe vomiting and diarrhea, with symptoms typically lasting 1 to 3 days. It spreads rapidly via contaminated food, water, or surfaces.

According to the Centers for Disease Control and Prevention's Vessel Sanitation Program, 102 of 3,116 passengers (3.3%) and 13 of 1,131 crew members (1.2%) reported violent vomiting and diarrhea during the ship's current 13-day Caribbean voyage.

The outbreak was officially reported to the CDC on May 7, 2026.

The ship departed Port Everglades in Fort Lauderdale, Florida, on April 28 and isn't scheduled to return until May 11.

This marks the fourth gastrointestinal illness outbreak tracked by the CDC on cruise ships so far in 2026 and the second involving a Princess Cruises vessel.

According to the CDC, Princess Cruises has been forced to ramp up emergency sanitation protocols, including intensified cleaning and disinfection, isolating sick passengers and crew, collecting stool samples for testing, and consulting with federal health officials in an attempt to contain the outbreak.

Princess Cruises also said the vessel will undergo a full deep cleaning when it returns to Port Canaveral.

This virus is different from hantavirus.