‘SHORT COURSE’ 6 months chemotherapy; -Pyrazinamide 2 months, Ethambutol 2 months -INAH 6 months, Rifampicin 6 months Good data in adults -East African/British MRC studies 1970s -Singapore Tuberculosis Service/British MRC 1970s & 1980s -Hong Kong Chest Service/British MRC 1970s & 1980s Criteria -pulmonary disease (TB adenopathy) -fully sensitive organism TREATMENT: HOW LONG