On the evening of September 4th, Weibo, the official of Northwest University for Nationalities, issued a notice about some students' symptoms such as diarrhea. As of 6: 00 p.m. on September 4th, 256 students in this school had symptoms of discomfort, 2 14 students had returned to normal classes, and the rest were receiving treatment with mild symptoms. Since September 2, students in this school have developed symptoms such as diarrhea. After multi-department field investigation and sampling detection, it was determined that it was caused by the superposition of norovirus infectious diarrhea, gastrointestinal cold and acclimatization.

Norovirus, also known as Norovirus, is a virus belonging to Norovirus in the human calicivirus family. It originated from an outbreak of gastroenteritis caused by a school in Norwalk, Ohio in 1968, and was later renamed Norwalk virus.

Diarrhea infected by norovirus is prevalent all over the world, mainly affecting adults and children. In the cold season, it is in a state of high incidence and erupts in schools, restaurants, hospitals and other places. This is an acute gastroenteritis virus, which can cause gastrointestinal inflammation, nausea, vomiting, abdominal pain, diarrhea and other symptoms, as well as headache, fever and other systemic poisoning symptoms. In severe cases, it will die of diarrhea and dehydration.

Norovirus is highly contagious and easily infected. Norovirus can be detected from the patient's discharge from before onset to within two weeks after recovery. Among them, the onset period and recovery period are the most susceptible time, which may be infected by eating or drinking food or water contaminated by norovirus, touching objects contaminated by norovirus, and entering the body through the mouth.

Norovirus-infected diarrhea is a self-limited disease, and there is no vaccine or specific medicine, but we can prevent it by some methods, such as personal hygiene, washing hands before meals, heating some foods that are not easy to cook, such as seafood, and not drinking uncooked water. Pay attention to personal hygiene, especially for parents.