Chronic wet cough or dry cough in children – an important difference in your history taking. Protracted bacterial bronchitis (PBB) is a leading cause of chronic wet cough in children. Current standard treatment is 2 weeks of antibiotics, but the optimal duration of therapy is unknown. Ruffles TJC et al (Lancet Respir Med 2021;9:1121–29) have described the first randomised controlled trial to assess the duration of antibiotic treatment in children with chronic wet cough and suspected PBB. The editorial by Gilchrist and Carroll [The Lancet Respiratory Medicine 2021;9:1078–1079) provides an interesting …