I'm sorry to react harshly @Xmasdemon but I really don't like the way this has been posted.
What do you expect the school to do in this case? Do you think they should just do nothing and let pupils get sick and suffer?
Are you trying to intimate that we're going back to the "bad old days of COVID' to whip up the usual froth on here about children's mental health and "let them catch a cold" etc?
YABVU.