Norovirus symptoms and prevention: Travel safety tips from a doctor

Norovirus can turn a holiday into a medical emergency in a hurry. It is one of the most contagious causes of acute gastroenteritis in the world and spreads rapidly in crowded settings such as cruise ships, airports, hotels, religious gatherings and tourist destinations.

It only takes a small amount of the virus to infect a person, so prevention is much more effective than treatment.

Who is most at risk?

Dr Jaya Agarwal, Consultant & Assistant Professor, Department of Gastrointestinal Surgery, Amrita Hospital, Faridabad, shares that although norovirus is generally not harmful for healthy adults, it can lead to severe dehydration in young children, older adults, pregnant women and immunocompromised individuals.

She says, "Norovirus is highly contagious because it can survive on surfaces for long periods of time and is easily spread through contaminated food, water and close contact with another person."

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Dr Agarwal also advises, "Travellers should never ignore repeated episodes of vomiting or diarrhoea, particularly if fluids cannot be retained. Dehydration can come on quickly, especially on long journeys or in hot climates."

Common symptoms of norovirus

Common symptoms develop within 12 to 48 hours of exposure and include sudden vomiting, watery diarrhoea, stomach cramps, nausea, a low-grade fever, headache and muscle aches.

Most people recover within one to three days, but the illness can disrupt travel plans and, in some cases, require hospital care because of fluid loss.

How can travellers reduce their risk?

Protection starts before the first meal of the trip.

Wash your hands thoroughly with soap and water before eating and after using the toilet, as alcohol-based hand sanitisers alone may not completely remove norovirus.

Drink bottled or properly treated water. Eat freshly cooked, hot food. Avoid raw or undercooked seafood. Wash fruits thoroughly or peel them yourself. Do not share utensils, water bottles or towels, especially if someone around you is unwell.

What should you do if you develop symptoms?

If symptoms develop, focus on oral rehydration with electrolyte solutions, get adequate rest, and avoid preparing food for others for at least 48 hours after symptoms have completely resolved, as the virus can still be transmitted even after recovery.

Dr Agarwal advises seeking medical attention immediately if you experience severe vomiting, blood in the stools, a high fever, decreased urination or signs of severe dehydration.

The bottom line

As Dr Agarwal explains, "Norovirus is highly contagious because it can survive on surfaces for long periods of time and is easily spread through contaminated food, water and close contact with another person."

A few simple precautions can significantly reduce the risk of norovirus and help ensure travellers return home with happy memories rather than an unwanted stomach infection.