The US has now had over 55,000 children hospitalized with Covid, most in last couple months

Just to forestall the folks saying "masks don't work," Duke University studied [i]one million[/i] school children in classrooms with varying amounts of masking, and found masks to be pretty effective:
https://today.duke.edu/2021/06/research-finds-masks-can-prevent-covid-19-transmission-schools