title: Letter: Massive use of chemoprophylaxis against tuberculosis.
mesh_terms: D000328:Adult; D001500:BCG Vaccine; D002648:Child; D006801:Humans; D007231:Infant, Newborn; D007538:Isoniazid / Q000009:adverse effects / Q000627:therapeutic use*; D012008:Recurrence; D013019:South Africa; D014397:Tuberculosis, Pulmonary / Q000188:drug therapy / Q000517:prevention & control*
chemical_list: D001500:BCG Vaccine; D007538:Isoniazid