If you had chicken pox as a kid, you can get Shingles [1] as an adult. I actually had it, without much complications but now there's a weird scar on my face.
Worth noting that there _is_ a chicken pox vaccine, you have to take two injections less than a year apart.
I never had chicken pox as a child and got the vaccine as an adult due to a colleagues child being exposed to the pox and knowing that it could affect me and my colleague quite badly.
I never had chicken pox as a child and got the vaccine as an adult due to a colleagues child being exposed to the pox and knowing that it could affect me and my colleague quite badly.