title: Experimental reproduction of the phenomenon of immunological unresponsiveness to formaldehyde, a relatively weak chemical allergen.
mesh_terms: D000485:Allergens; D000818:Animals; D004342:Drug Hypersensitivity / Q000276:immunology*; D004361:Drug Tolerance; D005557:Formaldehyde / Q000008:administration & dosage / Q000276:immunology*; D006168:Guinea Pigs; D006241:Haptens / Q000008:administration & dosage; D006321:Heart / Q000187:drug effects; D007108:Immune Tolerance; D007267:Injections
chemical_list: D000485:Allergens; D006241:Haptens; D005557:Formaldehyde