Studies have shown that novel coronaviruses can survive for up to 5 days in a suitable environment and that the virus is transmitted by droplets or by contact, while droplets are usually transmitted by coughing or sneezing. The transmission distance in the air is limited, usually only 1-2m, and it settles quickly from the body and does not float in the air, in the sense that there is generally no virus in the air and no question of how long it survives. However, because the droplets will settle on the surface of surrounding objects and will contaminate the surface of objects touched, such as doorknobs and elevator buttons, the virus will be contaminated. Now research has found that this virus can survive for several hours on smooth surfaces, if the temperature, moderate appropriate can survive 10 several days, for example, at a temperature of 20 ℃ and 40% humidity, some studies have shown that the new coronavirus can survive for 5 days.