Yeah, that's why I got the vaccine. I had been exposed countless times so it's amazing I didn't catch it (I worked with elderly people who had shingles frequently and could have caught it from any of them) plus my sister had it when we shared a bedroom as kids but somehow I didn't get it. I don't even remember why my doctor and I decided to test my immunity but when we did and it was negative he was pretty surprised as he said he'd never seen someone who'd had pox (even a few like me) without immunity. I'm so glad I didn't have to go through that as an adult. Or a kid I guess.