Nearly 100 people on board a Royal Caribbean cruise ship heading to South Florida fell ill with norovirus, health officials said.

According to the Centers for Disease Control and Prevention, 94 passengers and four crew members aboard the Serenade of the Seas came down with the highly contagious disease.

The outbreak was reported during a 13-day voyage. The ship set sail from San Diego on Sept. 19, making stops in Mexico and Costa Rica. After crossing the Panama Canal, the ship docked in Cartagena, Colombia on Monday.

The ship is expected to dock at PortMiami on Thursday morning.

Norovirus is a gastrointestinal virus that can spread quickly, especially in environments like cruise ships. Its symptoms include diarrhea and vomiting.

Cruise ships are required to report norovirus outbreaks

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