Wearing a mask can stop the spread of TB because TB is mainly spread through airborne droplets. TB patients can spread micro-droplets of Mycobacterium tuberculosis into the air when they cough, sneeze, talk, sing, or laugh, and they can survive in the air for several hours and be infected when inhaled by others. Therefore, you should stay away from TB patients and wear a mask if you come in contact with them. In addition, clothing and books of TB patients should be disinfected by ultraviolet light, and the room where they live should be ventilated frequently to avoid infecting others. Tuberculosis patients should spit in a spittoon with disinfectant solution, or in a tissue with disinfectant solution, or in a closed pocket, and should pay attention to cough etiquette and not spit anywhere.