Pre-treatment with parasite-derived exosomes before Alternaria extract administration led to a sharp reduction in bronchoalveolar lavage eosinophilia (Fig. 5a), and suppressed expression of the Type 2 cytokines interleukin (IL)-5 and IL-13 by innate lymphoid cells (ILCs; Fig. 5b,c). Here, IL13 is linked to Increased total eosinophil count.