Proper ventilation measures are necessary to reduce the effects of suspended aerosols. Aerosols may flow with the air, so if there is home isolation, it is necessary to isolate a single room or to be in a position where the whole house is ventilated, and to close the windows and doors of the house where the patient is located during natural ventilation of public areas or other rooms. For the residents of the general community, it is best to open windows and ventilate properly, but it should be noted that aerosols are likely to flow with the air. Therefore, avoid opening windows on the side of the patio and in the direction of the headwind.