I originally hadn't had a chicken pox shot. But I did develop chicken pox at age 5, and have a scar on my wrist from it. Later, because of the way that the school system checks for shot requirements, I was forced to get the immunization against chickenpox, because it was required. It didn't matter that I'd already had the disease, and was already immune. Bureaucracy can be irritating at times, but you just have to go along with it.