IFNG and allergic disease: Allergic diseases include heterogeneous inflammatory pathologies, such as respiratory and food allergies (FA), which are characterized by an immunological response with Th2 lymphocytes producing IL-4, IL-5, and IL-13 and low production of IFN-γ [195,199] and (Th9) producing IL-9 and IL-10 [196] as the main effector T cells.