The new diagnostic and treatment guideline specifically mentions aerosol transmission of novel coronaviruses. Droplet transmission and close contact transmission are two very important modes of transmission of novel coronavirus. In addition, the virus can exist in the form of aerosol in the air, suspended in the air, and can stay there for a long time. The longer the residence time, the greater the chance of contamination. The risks of preventing aerosol contamination are mainly in the following aspects: 1. Aerosols are more effective in confined spaces, especially in places where the air does not flow and people are more densely populated, which may be environments with higher concentrations of aerosols. Therefore, if you want to avoid aerosol contamination, you should try to avoid going to confined public places; 2. You should carry out ventilation in time to reduce the concentration of aerosols; 3. You should pay attention to disinfecting special environments on a regular basis, such as elevators, offices, etc., which can minimize the density of viruses and have a positive effect on preventing infection of new coronaviruses. Source: Dr. Yurai