Re: So... antivaccinating moms. School waiver?
For what it's worth, there's always a huge "you MUST send in your vax info NOW or your kids seriously for real won't be able to come anymore" thing at the schools in our area mid-year, so I probably wouldn't worry about it too much. We got a form for dd's preschool that I think was just a copy of the public school form that just had a place for dating when you did each one and then asked for your doc's info, and then on the back just had a "check here for exemption" and sign and date that. Super easy in Oregon, but I'm sure it varies.
Mama to Ada, 7-23-09 and Sylvia, 11-27-13