Chemoprophylaxis of tuberculosis.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007538:Isoniazid / Q000627:therapeutic use*; D014376:Tuberculosis / Q000517:prevention & control* / Q000628:therapy
D007538:Isoniazid