Th2cells play a critical role in the pathogenesis of allergy and asthma [9]and eosinophilshave a crucial role in the pathogenesis of allergic diseases and producefactors such as CCR3, CCR5, EOTAXIN 2, TGF-β1, and TARC.The inflammatory aspects of the disease are complex with mast cells, dendriticcells, and Tand B lymphocytes, and eosinophils playing important roles. The gene discussed is CCL17; the disease is allergic disease.