Tuberculosis is a respiratory infectious disease caused by Mycobacterium tuberculosis infection, and the number of days it takes to be discharged from hospital is not generalizable. Specifically: 1) for mild cases of definite tuberculosis, the patient may be discharged in 3-5 days or not at all; 2) for moderate cases of definite tuberculosis, such as obvious fever and chest pain, most of the patients can be discharged in 7-14 days; 3) for severe cases of definite tuberculosis, such as complicated hemoptysis or a weakened patient, the treatment time is often about 10-20 days 4. For those with more complications or underlying diseases, such as pneumothorax, respiratory failure or combined diabetes, pulmonary heart disease, etc., the time cannot be specifically estimated, and some may even be life-threatening and cannot be discharged. Therefore, the number of days to be discharged from the hospital for tuberculosis is an estimate and is influenced by many uncontrollable factors.