Combinations of the type-2interleukins (IL)-4, IL-5, IL-9 and IL-13 promote immune effector functions includingantibody isotype switching to IgE, adaptive T helper 2 (TH2) cellpolarization, eosinophilia, mast cell hyperplasia, goblet cell hyperplasia and tissuerepair. Here, IL5 is linked to Increased total eosinophil count.