title: [Basic immunology. How immunity works].
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D006680:HLA Antigens / Q000276:immunology; D006801:Humans; D007109:Immunity; D051381:Rats; D012397:Rosette Formation; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D006680:HLA Antigens