The school found that students were positive and should suspend classes in the case of high risk of transmission. If a large number of students are found to be positive in a short time, or in other cases, there is a great risk of virus transmission, which significantly threatens the health of students in school, classes still need to be suspended. Although the toxicity of COVID-19 has been greatly reduced, it is pathogenic and highly contagious.
The school found that the students were positive, and there was no need to suspend classes when there was little risk of transmission. If the number of positive students is small, the epidemic situation does not pose a great risk of transmission when the school stops classes, and the school may not stop classes for the sake of students' learning effect. After all, there will inevitably be a gap between students' learning effects at home and at school.
The situation in each school is different. After the "Class B Management" in COVID-19, if students are found to be positive, it is up to the school to decide whether to suspend classes. We should understand and support the decision of the school.
The above is only my personal opinion, thank you!