Epidemiology of ABPA Aspergillus hypersensitivity (AH) is defined by the presence of an immediate-type cutaneous hypersensitivity to A fumigatus antigens, and it is the first step in the development of ABPA. Only a minority of patients with AH develop the complete clinical picture of ABPA. The population prevalence of ABPA in asthma, generally referred to as 1 to 2%, is[…]