Norovirus:
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Norovirus is an animal-borne disease. It causes gastrointestinal illness including inflammation of the lining of the stomach and intestines, severe vomiting and diarrhoea.
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Transmission: Norovirus is easily transmitted through close contact with people who have been infected, or by touching contaminated surfaces. It can also be spread by eating food that has been prepared or handled by someone with a stomach bug.
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Symptoms: Diarrhoea, abdominal pain, vomiting, nausea, a high temperature, headache and body aches. But experts have said that acute vomiting and diarrhoea can lead to dehydration and further complications.
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Impact: Norovirus does not significantly affect healthy people, but it can be serious in young children, the elderly and people with comorbidities.
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Treatment: No specific treatment for the infection. Recovery generally depends on the health of the immune system. In most people, the illness usually resolves within a few days.
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Prevention: One should wash hands thoroughly with soap and water. Also, people should avoid contaminated food and water, including food that could have been prepared by someone who was sick.