I think it's actually harmless. The reason why the school requires students to wear masks is to avoid the possibility of epidemic infection. Although the possibility of infection is very small now, we should pay attention to it, especially in a crowded place like school. Moreover, the school staff come from all corners of the country, and there are also places in any region. You are not sure where he went when he was in his hometown, and you are not sure where he passed when he went back to school, so if a person at school is infected, it will definitely affect many people, and it is difficult to maintain this stable situation. If the school is infected, the situation will become very serious again.
So I think the time to really develop a vaccine is when we can take off our masks. Be sure to wear a mask and pay attention to personal hygiene in places where there are many strangers and a large flow of people. You may encounter something when you go out, so you must wash your hands and do a good job of personal hygiene when you go to the toilet. If you are at home or in some familiar private places, you don't need to wear a mask, because you can guarantee that the people you contact here have never been to other places and there is no possibility of infection at all.
Therefore, it is still a long way to take off the mask, and the start time has been determined, which means that our students should prepare for epidemic prevention in advance and prepare masks and alcohol. Although masks may affect your studies, they are far better than not starting school.