SummaryThe epidemiology of Zoster is analysed by means of data acquired from the Zoster Clinic at Moorfields and the RCGP Research Unit. It complements and extends previous surveys, using much larger and consistent data, showing the effects of age, sex and season. The behaviour in the population as a whole and the pathogenesis are discussed; a model is proposed to explain the characteristics of some of the data, particularly the effects of age and non-specific stresses.
Material and MethodsThe Zoster Clinic has been functioning for the last 15 years and during this time consistent records have been kept for nearly all attendances. These were recently put into computer storage, which has made overall statistical assessment and recall much easier. To date, about 1,200 patient records have been entered.The Weekly Returns Service of the RCGP pro vides data from 1967 and now covers a population of over 200,000 in 39 general practices scattered around England (33), Wales (4), Scotland (1) and N. Ireland (1). The figures for the last 3 years are accessible from computer, giving weekly numbers broken down by sex and 5 age groups. HZ and chickenpox are fortunately included in these returns.The data were prepared in graphical form for the sake of clarity, and no statistical tests were performed.