Same thing can technically be said about a HSR or a plane. You can't stop the train/plane because somebody got sick, and although you have a bathroom, and altho

Same thing can technically be said about a HSR or a plane. You can't stop the train/plane because somebody got sick, and although you have a bathroom, and although the extra space helps, the resources you have inside the car/plane are very scarce anyway. Yet, very few people die inside those things nowadays.