Rumor identification: No, can be divided into situations, the general community can open the windows to ventilate. Rumor analysis: 1, the virus left the cell after a short period of time to stay, and the activity is significantly reduced, even if the aerosol carries a small amount of virus, but the virus is not strong, and whether the new coronavirus can aerosol transmission, has not been determined. Even if the virus can be transmitted by aerosol, it needs to be present in sufficient quantities, and this will only happen in more confined or small environments. Because aerosols are rapidly diluted in an open environment, the concentration is significantly reduced. 2. It is very important to open windows regularly to keep the air fresh and circulating. If your neighborhood is not a congregate area, it is recommended to open the windows at least twice a day to reduce the risk of infection. Special Note: Aerosols can be divided into dust drift and dust fall depending on their size. Precipitated dust (particle size greater than or equal to 10μm) can settle down quickly under the action of its own gravity. Drifting dust, on the other hand, can float in the atmosphere for a long time, so it has the greatest impact on human health. Since dust with a particle size of less than 10μm is easily inhaled and absorbed by the human body, it is also called respirable particulate matter.