Don Firth has very good advice--if they won't accept your proof of vaccination, just threaten to sue everyone involved--in a low-key way, of course. It's amazing how that gets results.

And for all you folks who suggested home-schooling, that's fine if it works for you. It will not work if both parents have jobs, or if the kid in question needs the benefit of socializing with a lot of different people, etc. My disabled son needs to be in a school setting where he can observe normal behavior. The only private schools around here for special kids are primarily for autistic kids who are too disruptive for public school, which would not be good for my kid at all. At one point, they tried to force us into home-schooling him because he was having seizures--a problem for a great many special kids.Most speical-ed teachers can deal with this issue, and I know many who have. His major need is for socialization, so being isolated at home would not have been good.

And private schools for regular kids are not free, but you must continue to pay taxes to support free public schools anyway. Your kid has a right to public education, without being messed over by incompetent idiots.

All this puts me in mind of a kid who was expelled from school because she picked up her mother's brown-bag lunch by mistake. The mom had included a knife for peeling fruit in her own lunch. When the kid found it, she went at once to the teacher to hand it in and explain. She was expelled for bringing a weapon to school. I am pretty sure lawsuits ensued--I certainly hope so.