Dr's note for no mask for my kids

Anyone have any ideas what I need to tell my kid's doc to get a note to not have them wear a mask at school?

Orange county FL school board had an emergency meeting last night because a few kids at ONE school had tested positive for covid (which we all know is probably a false positive due to fucked up PCR test). But here's the kicker, now they are using that as excuse to require ALL kids in ALL schools in the county wear masks starting next Monday.

They said you can get a dr note to get an exemption - so I'm trying to think of something that will work to tell the Dr to get the note. Any ideas??