 [ Symptoms ] how to remove acne in body i have some acne around my bodyup what should i do [ Disease ] fully 99 5 of adults in the u s carry the shingles virus one third of those people get shingles and some of them go on to develop postherpetic neuralgia the risk of postherpetic neuralgia goes up with age more than 80 of cases of postherpetic neuralgia occur in people over 50 years old it is likely that the natural decline of immunity with age is responsible  says jeffrey ralph md assistant professor of neurology at the university of california san francisco and a fellow of the neuropathy association for unknown reasons white americans get shingles and postherpetic neuralgia at more than twice the rate of african americans in their age group people whose immune systems are impaired by drugs or diseases like aids are also more prone to zoster and phn  adds ralph