Delayed hypersensitivity to pollen.
D000937:Antigen-Antibody Reactions; D002648:Child; D006801:Humans; D006968:Hypersensitivity, Delayed / Q000209:etiology*; D008214:Lymphocytes / Q000276:immunology; D011058:Pollen; D012882:Skin Tests; D013950:Thymus Gland / Q000276:immunology