The prevalence of bullous pemphigoid in the US is reported as 6 to 10 cases per million, with a mean age of onset of 65 years.[2][5] A disease primarily of the aged, with an average onset of age 80 to 89 years; there is concern that the incidence may rise with the increased numbers of people living to advanced age.[6] One study in the UK reported a 17% average yearly increase in the incidence of bullous pemphigoid, while a study in France reported a threefold increase in incidence over a period of 15 years.[7][8]

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