Tuberculosis is a contagious disease that is mainly spread through respiratory droplets. In particular, TB patients who are sputum positive are more contagious, and visiting such TB patients is a risk of being infected, so you need to wear a mask when visiting TB patients. For tuberculosis patients, attention should be paid to the ventilation of the room and the management of sputum. You can’t spit, you need to spit in a closed container, and you need to wear a mask, which can effectively reduce the risk of contagion to others. The key to reducing infectiousness in TB patients is anti-tuberculosis treatment, and after anti-tuberculosis treatment, the infectiousness will drop significantly.