In young children, specific laboratory markers, such as eosinophilia and a high immunoglobulin E (IgE) level, as well as early‐life sensitization to airborne allergens confirmed by skin prick tests (SPTs) or by measuring specific IgE to airborne allergens in serum samples, have been documented as predictors of asthma in later life in hospital‐based follow‐up studies.12 This evidence concerns the gene IGHE and Increased total eosinophil count.