Ok if you want to do this then sure there is an easy solution. I think there are other problems with this though (for example no way this is flying even with the majority of people who are not anti-vax).

I'll bet it would be enough just to make sure that the vaccine waiver signature box is positioned directly below some glossy full color pictures of emaciated, rash covered dead children.

Excepting the turbo fascism, that is. People must be able feel agency while parenting or they can’t parent well.