FCER1A and asthma: In anaphylaxis models, the induction of migration seems to be related to IgE‐ and FceRI‐cross‐linking upon allergen contact.87 However, this might not be the case in asthma, as basophils are also increased in the airways of non‐allergic asthmatics,40, 41, 99 and the most common cause of asthma exacerbations is not allergens but respiratory viral infections.