As part of the September issue, the European Respiratory Journal presents the latest in its series of podcasts. Deputy Chief Editor Don Sin interviews Associate Editor Marcus Mall about neutrophil-derived biomarkers in bronchiectasis, as discussed in his review article in this issue of the ERJ: https://doi.org/10.1183/13993003.00081-2025 Correction: At 5 min 54 s in this podcast, in response to a question from D. Sin regarding the dosing of azithromycin, M. Mall mistakenly replied that “For the immunomodulatory effects, it would be a standard long-term therapy with a three times per day regimen.” He meant to say “three times per week”. We apologise for this error. Cite this podcast as: ERJ Podcast September 2025: Neutrophil-derived biomarkers in bronchiectasis. Eur Respir J 2025; 55: 25E6603. [https://doi.org/10.1183/13993003.E6603-2025]