Although aerosols spread farther than droplets, only a certain number and concentration of virus particles per unit volume will lead to aerosol transmission. Therefore, the public need not be overly concerned. To prevent indoor aerosol infection, we should also pay attention to the following points: 1, try to avoid going to confined spaces; 2, natural ventilation has a large amount of ventilation, the virus diluted to a certain degree after opening the window, the risk of infection is reduced; 3, poor ventilation in the elevator room, and a small space, be sure to wear a mask, careful touch; 4, diligent hand washing, scrubbing, and 1-2 meters safe distance from others.