As part of the May issue, the European Respiratory Journal presents the latest in its series of podcasts. Deputy chief editor James Chalmers interviews Marc Humbert (Université Paris-Sud, Faculté de Médecine, Université Paris-Saclay, and AP-HP, Service de Pneumologie, Hôpital Bicêtre, Le Kremlin-Bicêtre, and INSERM UMR_S 999, Hôpital Marie Lannelongue, Le Plessis Robinson, France) about omalizumab effectiveness in patients with severe allergic asthma according to blood eosinophil count.