Norovirus is correct option that are hardy and survive freezing and relatively high temperatures and chlorination up to 10 ppm.
The most typical reason for gastroenteritis is norovirus, sometimes known as the winter vomiting illness. Vomiting, non-bloody diarrhoea, and stomach discomfort are signs of infection. There may also be a fever or a headache. After exposure, symptoms often appear 12 to 48 hours later, and recovery normally takes one to three days. Dehydration is a common complication, particularly in children, the elderly, and people who already have other health issues.The fecal-oral pathway is typically used to disseminate the virus. This could happen as a result of tainted food, water, or interpersonal interaction. It can also spread through the air from an infected person's vomit or through contaminated surfaces. Unhygienic food preparation and close quarters sharing are risk factors. Symptoms are typically used to make a diagnosis. Although confirmation testing is not frequently accessible, public health organisations may carry it out during epidemics.
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