IL5 and asthma: Cytokines such as IL-5 [63], or chemokines such as eotaxin are produced in elevated levels and attract elevated numbers of eosinophils to the lumen and bronchi of the lungs in asthma [49] (Figure 4B), the nasal mucosa in allergic rhinitis [48] (Figure 3B) and to the skin in atopic dermatitis [64].