The incubation period of Mycobacterium tuberculosis is about 4-8 weeks, but the exact number of days after infection with Mycobacterium tuberculosis varies from person to person, and most people do not develop the disease. Tuberculosis is an infectious disease that can be easily contracted, but whether or not the disease develops after infection depends on the number of Mycobacterium tuberculosis bacteria, their virulence, and the patient’s own immune system. Approximately 90% of the population can be clinically infected with Mycobacterium tuberculosis and not develop the disease by killing it with their own immunity. The disease develops only when the patient’s immunity is low and the number of Mycobacterium tuberculosis is large, which accounts for only about 10% of cases, and symptoms, including cough, sputum, low fever, and night sweats, appear in about 4-8 weeks. After the diagnosis of tuberculosis is confirmed, it is important to go to the infection department for early, regular, combined, moderate and full anti-tuberculosis treatment so as to ensure the efficacy. In addition, patients should pay attention to protection so as not to infect more people.