Norwalk Viruses (NV), also known as Norwalk Viruses (NV), belong to the genus Norovirus (NV) in human calicivirus (HuCV). It is a group of virus particles with similar morphology and slightly different antigenicity.
Norovirus-infected diarrhea is prevalent all over the world, which can occur all year round, mainly affecting adults and school-age children, and it is high in cold season. Norovirus causes 60%-90% of all non-bacterial diarrhea outbreaks in the United States every year.
The Netherlands, Britain, Japan, Australia and other developed countries have similar results. The detection rate of norovirus in children with diarrhea under 5 years old in China is about 15%, and the survey of serum antibody level shows that norovirus infection is also very common in China.
"Norovirus" infectious diarrhea is a self-limiting disease, and there is no vaccine and no specific medicine. The public should do a good job in personal hygiene, food hygiene and drinking water hygiene to prevent this disease. It is necessary to develop healthy living habits such as washing hands frequently, not drinking raw water, separating raw and cooked food, and avoiding cross-contamination.