Consider what state you live in. In Texas you can get a waiver. It is a felony in Texas for any institution, such as public schools, to discriminate against you if you have the waiver.
Given that, my 6yo daughter has the waiver. No vax's. Never been sick other than a slight cold a couple times. She threw up for the first time in her life a couple months ago at age 5. That's right, she never spit up as a child. It was just a 24hr bug. Recovered fully by next day. Probably naturally has the antigen for that strain now. She's extremely observant, mentally focused and sharp as a tack.