However, the cure does not result in a strong immunity to tuberculosis, and new infections can occur and even develop into tuberculosis if there is close contact with infectious tuberculosis patients. In some cases, patients who are cured of tuberculosis still have tuberculosis bacteria lurking in their bodies, and once their resistance decreases, there is a possibility of relapse. Therefore, after being cured of tuberculosis, it is still necessary to strengthen the prevention of tuberculosis and to maintain good hygiene and behavior habits. Some patients are also worried about the shadow left in the lungs after TB is cured. If the fibrous calcified lesions seen under the chest X-ray are in fact old TB, they are the manifestation of cured TB and have no effect on work, study, life, job entry and school medical examination. Tuberculosis is not a hereditary disease and will not be passed on to the next generation.