I would love to know the average time your DC developed Chicken Pox between being exposed to it and it arriving? I know incubation can be up to 21 days, but does it normally take that long, or is it more usually full tilt before that? DS had a mate round with a couple of unexplained spots that quickly turned into CP 9 days ago now, and I'm trying to think worst case scenario in terms of timing/ holidays, etc.