The transmission of novel coronavirus pneumonia is through droplet transmission and contact transmission. Contact transmission is when the novel coronavirus reaches the surface of an object through droplets and can survive for a certain period of time. If the virus is active on the surface of an object, hand contact with the active virus by a healthy person and subsequent contact with the conjunctiva, such as the conjunctiva of the eye, may cause infection, i.e., contact transmission. In order to avoid contact transmission, when there is contact with the external object surface in the outside world, the first thing to do when you return home is to regulate hand washing. A few rushes of water will not achieve disinfection. Content source: Dr. Yurai