Earlier quoted context omitted.
IIRC it's fairly common nowadays to administer the vaccine to children in Canada/US. The main trade-off I've seen is that a small percentage of people who get the vaccine end up with pox at the age of 20-30 where the complications (pox on internal organs) can require hospitalization and/or cause death. The flip side being, of course, that a small percentage of people infected with chicken pox as kids also require hos…
Are you talking about something other than shingles? This study seems credible enough (the Web MD article even manages to discuss how they dealt with several obvious confounding factors): http://www.webmd.com/children/vaccines/news/20131202/chicken... The CDC says shingles is less common in vaccinated individuals (under "Other safety information"): http://www.cdc.gov/vaccinesafety/vaccines/varicella/
I was referring to cases where someone has received the chicken pox vaccine but still gets sick with the chicken pox later in life.
Granted, it also looks like the vaccine is made from actual virus? So maybe it is shingles after all. I don't science enough to say.