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Over 70 Sickened by Norovirus Outbreak Aboard Royal Caribbean’s Serenade of the Seas

A norovirus outbreak has struck more than 70 passengers and crew aboard Royal Caribbean’s Serenade of the Seas, prompting swift action from health authorities and cruise officials as the ship sails toward Miami.

According to the Centers for Disease Control and Prevention (CDC), at least 71 passengers and one crew member have reported gastrointestinal symptoms—including vomiting, diarrhea, abdominal cramps, and fever—during the 13-night voyage that departed San Diego on September 19. The ship is scheduled to dock in Miami on Thursday, October 2.

Rapid Spread of Norovirus Onboard

The outbreak was first reported on Sunday and has since affected nearly 4% of the 1,874 passengers onboard. All infected individuals have been isolated, and stool samples have been collected for laboratory testing, the CDC confirmed in its official outbreak summary.

“Reporting gastrointestinal illness is essential,” the CDC stated. “When passengers and crew notify the onboard medical center about symptoms, it enables early detection and containment of outbreaks” (CDC).

Norovirus, often referred to as the “stomach flu,” is highly contagious and spreads easily in close quarters like cruise ships, schools, and nursing homes. Symptoms typically include nausea, vomiting, diarrhea, muscle aches, and headaches, and can last from one to three days.

Royal Caribbean Responds with Enhanced Safety Measures

In response to the outbreak, Royal Caribbean has ramped up its cleaning and disinfection protocols. “The health and safety of our guests, crew, and the communities we visit are our top priority,” the company said in a statement to USA Today. “We implement rigorous cleaning procedures, many of which exceed public health guidelines.”

The CDC has dispatched Vessel Sanitation Program (VSP) personnel to monitor the situation and ensure compliance with sanitation standards. The VSP routinely inspects cruise ships and investigates outbreaks of gastrointestinal illness.

Cruise Industry Faces Ongoing Health Challenges

This incident marks the 19th gastrointestinal outbreak reported on cruise ships in 2025, according to CDC data. While norovirus is not typically life-threatening, its rapid transmission and disruptive symptoms make it a persistent challenge for the cruise industry.

Public health experts emphasize the importance of hygiene and vigilance. “Handwashing is the single most effective way to prevent norovirus,” said Dr. William Schaffner, an infectious disease specialist at Vanderbilt University Medical Center. “Cruise lines must remain proactive, especially during peak travel seasons” (NBC News).

What Passengers Should Know

Travelers are advised to:

• Wash hands frequently with soap and water, especially before eating and after using the restroom
• Avoid sharing food, drinks, or utensils
• Report any symptoms to onboard medical staff immediately
• Stay hydrated and rest if symptoms occur

Norovirus outbreaks are not uncommon on cruise ships, but early detection and containment can significantly reduce their impact. As Serenade of the Seas approaches its final destination, health officials continue to monitor the situation closely.

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