Trains are susceptible to novel coronavirus infections because they are confined spaces with poor air circulation and are densely populated. Novel coronavirus infection is spread mainly by respiratory droplets and close contact between people, and to a lesser extent by aerosols in confined spaces. If a person has been infected with novel coronavirus on a train, the train is a confined space where air is not easily circulated and aerosol transmission is very likely, so it is risky to travel by train. It is not recommended to use transportation during the epidemic. If you have to use transportation, you must wear a good mask, keep the distance between you and people as far away from each other as possible, and do a good job of disinfecting your hands, avoiding touching your mouth, nose, eyes and other locations with dirty hands, which can prevent the spread of the new coronavirus as much as possible.