Norovirus is one of the world’s most contagious stomach viruses and can spread quickly through contaminated food, water, surfaces, and close contact with infected people. Symptoms usually appear within 12–48 hours and include sudden vomiting, watery diarrhea, stomach cramps, nausea, headache, and mild fever. While most people recover within a few days, dehydration can be dangerous for young children, older adults, pregnant women, and those with weakened immune systems. To reduce your risk while traveling, wash your hands with soap and water, drink safe bottled water, eat freshly cooked food, avoid raw seafood, and don’t share utensils. If severe dehydration, persistent vomiting, or bloody stools develop, seek medical care immediately.
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