I did not scratch or pick at the spots on my face and still got the scars. My parents warned me what would happen (scars) if I scratched them. I did not touch them, so it is not always the case that scarring means the person scratched. I was so careful and now I have to live with these scars. It really bothers me.
We delay vax, and because of my experience my kids will eventually get the CP vaccine. DD will get it before she goes to kindergarten next year.