The number of days a healthy person is usually infected is related to the level and duration of exposure to a TB patient and the individual’s immunity. Tuberculosis is a common respiratory infection that is spread primarily by droplet transmission. A healthy person with normal immunity and a TB patient may not be infected after a short period of general contact, but a healthy person with low immunity and a long period of close contact with a TB patient may develop symptoms of infection after about 7-14 days of contact, with early clinical manifestations of coughing, coughing, low fever and malaise, and late symptoms of high fever, coughing up blood and difficulty in breathing. Tuberculosis can be cured basically with standard treatment, but the specific cure time is related to the degree of the disease. In addition, patients with tuberculosis must go to the respiratory medicine department of regular hospitals in a timely manner, not to spit at will, and actively cooperate with doctors for treatment. Healthy people should also pay attention to hygiene, actively exercise, strengthen their resistance, avoid close contact with TB patients, and also be vaccinated for prevention.