People often ask me: Is TB contagious? Or, if someone in my family or workplace has TB, can I be infected? Or, I’ve had TB for eight months now, but my family still keeps my dishes away from me! …… China has a high rate of TB infection and incidence, and in 2014, the mortality rate of TB was reported to be close to that of AIDS, but the awareness of TB among the general public is still far from adequate. It is the duty and responsibility of every worker in the tuberculosis prevention system to promote tuberculosis and make people understand and value it correctly. Just like the comrades of “BaiDu Tuberculosis Post”, they waved the flag and shouted for TB and patients all the way, persevering, resilient, brave, happy, and singing forward! The source of TB infection is mainly TB patients with TB bacteria in their sputum, that is, in theory, only sputum-positive TB patients are infectious, those with simple TB pleurisy meningitis peritonitis intestinal TB lymphatic TB, etc. are not infectious. However, it is estimated that some patients with sputum-negative bacillus-negative tuberculosis are also infectious to a certain extent, which can be interpreted as: not detected when sputum examination is done, and not done at a certain stage when the patient has excreted the bacteria. The main route of transmission of tuberculosis is respiratory transmission. A sputum smear-positive tuberculosis patient coughs, sneezes, and spews out droplets with tuberculosis bacteria when speaking loudly, and a healthy person inhales the lungs causing infection and tuberculosis. The safe distance is 2 meters. According to statistics, an infectious TB patient can infect an average of 10-15 people in a year. In other words, if an extra-pulmonary TB patient is not contagious, and a TB patient does not have these actions such as coughing, sneezing, or talking loudly, it is not contagious, and it is generally not spread through diet, shaking hands, and so on. So how can we cut off the transmission route or reduce the risk of TB transmission? The most effective way is to cure a patient with active TB. Generally, after 2 weeks of strict and regular anti-tuberculosis treatment, the infectiousness of a TB patient is greatly reduced, and within 1 month of treatment, the infectiousness disappears. However, in patients with cavities in the lungs, their elimination period may exceed 3 months. As a TB patient itself, the measures for disinfection and isolation are: 1. The patient’s room is often open to sunlight and keep indoor air circulation; 2. The quilts and clothes are dried diligently, and eating utensils are best boiled before use; 3. The patient should not spit anywhere, and sputum should be buried deeply or dumped into the toilet only after harmless treatment. Do not laugh or joke loudly in the face of others, and cover your mouth and nose with a handkerchief or hand towel when coughing or sneezing. Close contacts of TB patients are advised to go to professional institutions for timely examination. At present, chest radiographs and tuberculin tests are generally used, and those with a strong positive test reaction are recommended to receive preventive anti-tuberculosis treatment for 3 months. However, there are no authoritative reports on whether prophylactic treatment is effective in reducing the chance of active tuberculosis.