allergic disease immunologic hypersensitivity allergy 616.97 http://id.loc.gov/authorities/subjects/sh85003662 http://purl.bioontology.org/ontology/MEDDRA/10001738 http://purl.obolibrary.org/obo/HP_0012393 http://purl.obolibrary.org/obo/OBI_1110049 http://www.ebi.ac.uk/efo/EFO_0003785 https://en.wikipedia.org/wiki/Allergy https://homosaurus.org/terms/allergies https://www.wikidata.org/wiki/Q42982 RA645.A44 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. QR188 RC583-RC598 allergic condition allergies allergic response