Tuberculosis generally requires isolation for about two months, but this is not absolute. The actual isolation needs to be considered based on the patient’s lung CT, review of sputum test results and blood sedimentation. If the sputum is still positive after two months, a longer isolation is needed. Isolation for drug-resistant TB can be very long, and may generally take about six months or even a year. So for TB patients, especially those with sputum-positive TB, it is more contagious and isolation is recommended. Generally, after two weeks of anti-tuberculosis treatment, the infectiousness decreases significantly, and in most patients, the infectiousness is basically gone after two months of treatment. But at this time, the medication should not be stopped, because the course of TB treatment takes six months.