My nephew had it when about 15 months old, badly. I remember my sister in law saying it was cruel to have it so young as he didn't understand what was going on with being covered in horrible itchy things. It was in question whether I'd get to go to theirs for a family Christmas though all blisters had covered by then in case I picked it up.
Have you ever had it? One, bonus of the chickenpox saga I had a couple of weeks ago was that I know I'm immune to it (I think) from whatever blood tests they did - I think that's what they said anyway, as well as confirming not chickenpox - I got a bit confused over the different blood tests they did.
I had it as a child, badly apparently, though although doctors said it wasn't usual and you aren't supposed to get it again that people do. It was worrying with the speed I was sent to A&E and admitted.
Sqad, do you know why this particular virus is so dangerous to people with compromised immune systems?