Tuberculosis is usually not contagious to others after it is cured. Tuberculosis is a respiratory infection caused by Mycobacterium tuberculosis infection, which occurs in lung tissue, trachea, bronchus and pleura. It is mainly transmitted through droplets. If the Mycobacterium tuberculosis in sputum disappears after a regular anti-tuberculosis cure for tuberculosis patients, it is not contagious. For this period of tuberculosis patients, you can use anti-tuberculosis drugs under the guidance of the doctor to consolidate for a period of time, such as isoniazid, rifampicin and so on. Then pay attention to dietary adjustments, do not smoke, which will make the resistance of the lung tissue decline and the recurrence of symptoms. In the course of treatment, patients with tuberculosis need to go to the Department of Infectious Diseases of regular hospitals for regular checkups, and regular reexaminations of lung CT to assess the efficacy of treatment. Consult your doctor for specific conditions and follow the doctor’s instructions.