My DS got it at 14 months. It was a really mild version, about 5 spots and he didn't scratch at them. He needed to be very close and didn't sleep well. He got a couple of bumps before the classic blisters so it took a couple of drs visits to be diagnosed. Once the blisters are gone they're not infectious, its only in the early stages that the virus is airborne. Good luck, I hope its as easy as it can be!