The European Respiratory Journal (ERJ) is the flagship journal of the European Respiratory Society. It has a current impact factor of 24.9. The journal covers various aspects of adult and paediatric respiratory medicine, including cell biology, epidemiology, immunology, oncology, pathophysiology, imaging, occupational medicine, intensive care, sleep medicine, and thoracic surgery. In addition to original research material, the ERJ publishes editorial commentaries, reviews, short research letters, and correspondence to the editor. The articles are published continuously and collected into 12 monthly issues in two volumes per year.