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Gastroenteritis is the inflammation of the stomach, small intestine, or large intestine, leading to symptoms such as vomiting and diarrhea. Several viruses can cause viral gastroenteritis, with the most common being rotavirus, norovirus, and adenovirus.

Once an infectious disease invades, it is very easy to cause the spread of the epidemic, and it is more likely to spread from the school to the family and even to the community, resulting in a pandemic.