To the Editor, Growing up on traditional farms is associated with protection against the development of wheezing, respiratory allergies, and asthma.1 Rhinovirus (RV) infections in early life are a substantial risk factor for asthma development and are linked to mucus hypersecretion in the lungs.2, 3 This results in impaired mucociliary clearance, which contributes to obstruction of (small) airways, processes implicated in asthma pathogenesis.4 Interestingly, the protective farm-effect against...