1. Usually only people with pulmonary or laryngeal TB are infectious. People with extrapulmonary TB are generally not infectious.

2. Patients can be considered non-infectious when they received adequate treatment for 2 weeks or longer even if their sputum smears are still positive.

3.The main goals of a TB infection-control program are to detect TB disease early and to promptly isolate and treat people who have TB disease.

4. Respirators protect individuals from inhaling droplet nuclei; surgical masks stop droplet nuclei from being exhaled into air by infectious TB patients or suspects.

5. Sputum induction should be done in sputum induction booths or special AII (Airborne Infection Isolation)rooms to prevent any droplet nuclei expelled during the procedure from reaching other parts of the facility.

6. Children are less likely than adults to be infectious, but they can still transmit TB if they exhibit signs of infectiousness.

7. Mr. Nguyen, a patient with pulmonary TB, has been receiving DOT treatment for 6 weeks and no longer has symptoms of TB. He has three sputum smears and they are all negative. Mr. Nguyen is no longer considered infectious.

8. Ms. Hernandez has been admitted to hospital due to coughing up blood, her chest x-ray showed a big cavity in the right upper lung, sputum smears were all positive for TB. She has received active TB treatment for 2 weeks in the hospital and she is no longer coughing up blood and does not have other TB symptom. She wants to be discharged home to continue TB treatment as outpatient because she has to take care of 3 grandchildren age 1,3 and 5. The health department should approve the discharge because her symptom improved and she is likely no longer infectious.

9. TB patients and TB suspects may be sent home after starting treatment, even though they may be infectious.

10. Ventilation systems maintain negative pressure and exhaust air properly.