A 9 year follow up of post herpetic neuralgia and predisposing factors in elderly patients following herpes zoster.

Unlabelled: To characterise predisposition to post herpetic neuralgia following herpes zoster.

Design: Late follow up of patients originally admitted with acute zoster to a double blind randomised placebo controlled study of oral acyclovir over 60 years of age.

Setting: Two UK cities of 1.