M.B.
My oldest also had the "breakthrough". She only had about four pox right by her hairline--that was it and they did not bother her at all! They didn't itch and were gone fairly quick. I'm not sure about the contagious thing but I would check with your pediatrician and find out how long they are contagious and whether they can be passed by air or just by touch by that point in the cycle...I'm not sure at all. We could keep her away from kids and they were gone really soon but from what I remember her dr said that she was already passed the contagious point when we took her to the dr. It is the worst before the sores show up! Again, I'm going off memory from 3 years ago but that's what I recall. Like I said, it was not that bad---nothing close to what we had to go through as kids!