Kindof OT, but my mom, sister, and I all had Scarlet Fever in the mid-70's. I was late toddler/early preschool age and my sister was probably in 4th or 5th grade. We were miserable, but none-the-worse for the wear in the long-run, including my mom. I thought I had measles, but my mom thinks the only rash I had was in association with SF.
Oh, and all three of us never had CP - I know I was directly exposed to it a couple of times; both my nieces have had it yet my sister never got it. Unfortunately I was bullied into the vax shortly after ds#1 was born because I had no antibodies for CP, and the doctor (and my former ob) told me that if I were exposed again while pregnant and got sick that the baby would be in grave danger. So, fear took over rather than common sense (many exposures and never sick ... hmm ... maybe natural immunity?), and I let myself get shot. GRR ... but I'm hoping the stupid shot didn't interfer with my immunity, and hope to expose my boys when they are a year or two older (and soon-to-be born baby is at an age where it'd be safe for him/her to be exposed).
Oh, and ds#1 asked me out of the blue the other day, "Mommy, when am I going to get the chicken pox?" He wasn't even worried about it, but more like, this is a normal thing ... is it my turn yet? I asked him where he learned about CP and he said, "Caillou had CP the other day."