Class as a unit, medical institutions after the initial screening of nucleic acid detection positive, confirmed cases or asymptomatic infection cases 1 case, temporarily suspended classes. After expert judgment, the scope of suspension can be expanded according to the judgment result, and the suspension period is determined by the local epidemic prevention and control headquarters according to the epidemic situation.

Taking the school (campus) as a unit, the disease control department of COVID-19 has confirmed 2 or more confirmed cases or asymptomatic infected persons, and all classes in the school (campus) have been suspended. The suspension period shall be determined by the local epidemic prevention and control headquarters according to the epidemic situation.

This is the standard for suspension of classes in Chengdu, and there is not much difference across the country.