title: Mechanism of actively acquired immunological tolerance.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000941:Antigens / Q000008:administration & dosage; D002454:Cell Differentiation; D006801:Humans; D006968:Hypersensitivity, Delayed; D006969:Hypersensitivity, Immediate; D007108:Immune Tolerance; D007231:Infant, Newborn; D008221:Lymphoid Tissue / Q000166:cytology; D009154:Mutation; D011135:Polysaccharides, Bacterial / Q000494:pharmacology; D011830:Radiation Effects
chemical_list: D000941:Antigens; D011135:Polysaccharides, Bacterial