Okay, when you are older, a chickenpox infection can be worse. However, if you have had a the vacination, you are likely to only get a mild outbreak. Many of the answers that are refering to male sterility may be confusing chickenpox with mumps. Orchitis is a complication of mumps in about 50% of post pubescent males, and leads to testicular atrophy in about 50% of those cases.On MedlinePlus, a site run by the National Institute of Health, male sterility is not listed as a complication of chickenpox. http://www.nlm.nih.gov/medlineplus/ency/article/001592.htm#Calling%20your%20health%20care%20providerIf you have had chicken pox, or the chicken pox vaccine, you are now at risk of getting shingles when you get older, or if your immune system becomes compromised.http://www.ninds.nih.gov/disorders/shingles/shingles.htm(Though not listed in this article, acupuncture can be quite helpful in dealing with the pain of post-herpatic neuralgia or shingles.)Death from complications of chicken pox may occur. The most common of which would probably be Reyes Syndrome; associated with children being given asprin while they have a chicken pox infection. http://www.nlm.nih.gov/medlineplus/ency/article/001565.htmHope this helps.