Benralizumab has been investigated for the treatment of other eosinophil-associated diseases, including a phase 3 study for eosinophilic granulomatosis with polyangiitis (EGPA) in which benralizumab was non-inferior to the anti-IL-5 monoclonal antibody mepolizumab: as a result, benralizumab was recently approved for the treatment of EGPA. This evidence concerns the gene IL5 and eosinophilic granulomatosis with polyangiitis.