Silver Book Fact
Postherpetic neuralgia in shingles

Complications, including postherpetic neuralgia (PHN) occur in ~50% of older persons with shingles.
Oxman M, Levin M, Johnson G, Schmader K, et al. A Vaccine to Prevent Herpes Zoster and Postherpetic Neuralgia in Older Adults. NEJM. 2005; 352(22): 2271-84. http://www.nejm.org/doi/full/10.1056/NEJMoa051016