If TB is treated promptly when it is acquired, life expectancy is generally not affected; if the disease is severe or accompanied by complications, life expectancy may be affected. If the symptoms are severe and the lesions are extensive when TB is detected, or if it has not yet been cured resulting in severe destruction of the lung structure, making it difficult to return to normal, it may affect life expectancy, e.g., pulmonary fibrosis, complication of meningitis, etc.; or if it is accompanied by HIV/AIDS, the disease may progress rapidly and the mortality rate is extremely high. If the lesions are small and the symptoms are mild, or if the disease is treated in time, life expectancy is usually not affected. It is recommended that when TB infection is detected, it should be treated as soon as possible, e.g. with isoniazid, rifampicin and other medications under a doctor’s supervision.