title: Problems of potency evaluation of tuberculin preparations in BCG-vaccinated children.
mesh_terms: D000293:Adolescent; D000907:Antibodies, Bacterial; D000917:Antibody Formation; D000942:Antigens, Bacterial; D001500:BCG Vaccine; D002648:Child; D005069:Evaluation Studies as Topic; D006801:Humans; D014373:Tuberculin / Q000592:standards*; D014374:Tuberculin Test; D014376:Tuberculosis / Q000175:diagnosis / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D001500:BCG Vaccine; D014373:Tuberculin