Impact of COVID-19 in patients with autoimmune bullous diseases: Report from an international registry

For autoimmune bullous diseases (AIBD) such as bullous pemphigoid (BP) and pemphigus an increased risk of COVID-19 infection and mortality was reported, with oral prednisolone (dose ≥10 mg/day) and treatment of rituximab being a risk factor. A population-based cohort study showed an increased COVID-19 associated mortality in patients with BP, but not in patients with pemphigus vulgaris. Here, we provide the findings of an international registry for health care providers about COVID-19 infection in patients with AIBD, reporting on timing and clinical presentation of COVID-19 infection, AIBD disease activity and outcome.