hypersensitivity reaction disease allergic disease https://www.malacards.org/card/allergic_disease true allergic form of immune system disease allergic response SCTID:609328004 allergic disease or disorder disorder of type I hypersensitivity DOID:1205 UMLS:C0020517 NCIT:C114476 MONDO:0005271 ICD9:V15.09 allergy MEDGEN:9370 allergic form of disease or disorder allergic reaction type I hypersensitivity disease ICD9:995.3 MESH:D006967 An immune response that occurs following re-exposure to an innocuous antigen, and that requires the presence of existing antibodies against that antigen. This response involves the binding of IgE to mast cells, and may worsen with repeated exposures. autoimmune disease