There is nothing wrong with strengthening precautionary measures at the current time of the epidemic, but it is also necessary to open windows appropriately, to choose the right time to open windows, the specific precautionary measures are as follows: 1. In daily life, we should ensure that air circulation, indoor air exchange, aerosols will be blown away with the wind. If there are no bad living habits, such as spitting, the possibility of this infection will be very small. You can open the windows several times a day to ventilate the room, keeping the total duration at 2-3 hours to renew the indoor air, and even if there are aerosols, they will settle down. Use disinfectant to mop the floor, wipe the table, etc. in accordance with the requirements of preventing contact transmission; 2. When there are isolated patients upstairs and downstairs, it is necessary to be flexible in the timing of window opening, such as the windows of a point building to avoid opening directly opposite to the neighbors to stagger the air exchange or not to open a particular window. If the distance between the building is not big or old district, the population living density is very large, and in the known around the infected patient, do not recommend frequently open the window to change the air, so as to avoid in case the neighbor’s home to change the air time is exactly the same as their own home, and it happens to be the wind direction is still blowing against their own home, there is a possibility that other people’s homes with viruses in the air and their own home to communicate, so that the virus into their own homes. Content source: Dr. Yurai