@aeva they already have a bunch of air cleaners but preschoolers have bad hygiene and are constantly hugging and jumping in each others faces so there are limits as to how much room level filtration can help. They also spend a lot of time outside.
From what the teachers tell me the kids actually get sick a lot less often than at other schools without such precautions.
But getting sick once a month after years of basically never being sick... Definitely sucks lol