TB (Tuberculosis) is spread from person to person through the air, and being in enclosed spaces may increase the risk of TB infection. (Avoid staying for a long time in enclosed spaces such as Internet café, KTV, night club, or billiards hall.)
Symptoms of TB: Coughing that lasts two weeks, having sputum when coughing, chest pain, loss of appetite, weight loss, etc. (If you have a cough for more than two weeks, please see a doctor.)