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A recent norovirus outbreak aboard a Caribbean cruise ship that sickened more than 100 passengers and crew members has once again raised concerns about the highly contagious stomach virus. The outbreak, reported during the ship’s April 28 to May 11 voyage, is among several gastrointestinal illness incidents recorded globally this year.   Norovirus is one of the most common causes of acute gastroenteritis, triggering sudden vomiting, diarrhoea, nausea and stomach cramps. While the illness usually lasts only a few days, health experts warn that it spreads rapidly in crowded settings such as cruise ships, schools, hospitals and care homes. Is there a treatment for norovirus?  There is currently no specific antiviral medicine or approved vaccine for norovirus. Doctors say treatment mainly focuses on managing symptoms and preventing dehydration, which is considered the biggest risk associated with the infection. Patients are generally advised to:

• Drink plenty of fluids
• Use oral rehydration solutions if necessary
• Rest and avoid strenuous activity
• Eat light and bland foods once symptoms improve

In severe cases — especially among young children, elderly people and those with weakened immune systems — hospitalisation may be needed if dehydration becomes serious.   Symptoms usually begin within 12 to 48 hours after exposure and may include vomiting, watery diarrhoea, stomach pain, mild fever, headache and body aches. Most people recover within one to three days. Why is norovirus so contagious?  Health experts say norovirus spreads extremely easily because only a tiny amount of the virus is enough to infect another person. The virus can spread through contaminated food, water, surfaces and direct contact with infected individuals. It can also survive on surfaces for long periods, making outbreaks difficult to contain once they begin. Crowded environments with shared dining spaces and common facilities are especially vulnerable. Recent discussions following  have highlighted concerns over hygiene practices and rapid passenger turnover on vessels, with several travellers pointing to repeated outbreaks despite deep-cleaning efforts. How can people protect themselves?  Public health agencies stress that hand hygiene remains the most effective defence against norovirus. Experts recommend washing hands thoroughly with soap and water, particularly after using the toilet and before eating or preparing food.   Other precautions include:

• Avoiding close contact with infected individuals
• Cleaning contaminated surfaces immediately
• Washing fruits and vegetables properly
• Avoiding food preparation while sick
• Staying home for at least 48 hours after symptoms end

Experts note that alcohol-based hand sanitisers may not always be fully effective against norovirus, making soap-and-water handwashing especially important. Are there any cases in India?  As of now, there are no major active norovirus outbreaks reported in India in 2026. However, India has recorded sporadic outbreaks in previous years, including cases in Kerala linked to contaminated food and water sources. Health authorities continue to monitor global outbreaks closely, particularly after recent international cruise ship incidents involving infectious diseases. Recent statements from Indian health agencies regarding other viral outbreaks, including hantavirus cases linked to cruise ships, have emphasised that there is currently no immediate public health threat to India.