Jiang Rongmeng, Chief Physician of the Second Department of Infection, Beijing Ditan Hospital: The virus is spread through droplets and contact. In the air, the distance of droplets spread is very limited, about one to two meters. It is very fast after coming out of the human body. It sinks, so it won't float in the air. In this sense, there will be no viruses in the air.

Droplets can settle on the surface of an object, or contaminate the surface of the object touched by the hand with the virus, such as door handles and elevator buttons. Now studies have found that the virus can survive on these smooth surfaces for several hours. If the temperature and humidity are appropriate, it may survive for several days, such as a temperature of 20 degrees Celsius. It is particularly suitable in an air-conditioned environment, with a humidity of 40% to 50%. Studies have found that the past coronavirus may survive for up to 5 days. Based on this point of view, the virus spreads through contact, that is, if a person sneezes and does not pay attention to covering it, there will be a virus. The virus will contaminate door handles and elevator buttons. If the next person does not wash their hands, rub their eyes after contact. , Picking the nose, it is possible to spread the virus through contact. Droplets of respiratory infectious diseases are spread through hands more often, so be sure to wash your hands. This is a particularly important point.