"Wendy Marsden" wrote
I have evaluated the risks versus the rewards of my kid getting chicken
pox and I feel that the risk of complications from chicken pox during
childhood is less than the risk of complications from loss of immunity in
him as an adult. ...

That should be your right. The vaccination requirements make it
difficult for parents like you.

If your state and school accept religious or philosophical exemptions,
then you could claim an exemption to vaccines generally, and not
tell the school that your kid has actually had most of the vaccines.