Generally, you cannot get infected with coronavirus by opening windows for ventilation. Opening windows for ventilation generally does not cause the spread of the virus. Frequent opening of windows for ventilation during virus epidemics to maintain air flow is also conducive to the prevention of viral infection. This is because viruses can float in the air within a short period of time. If the air is not circulated and windows are not opened frequently for ventilation, it will be easy for viruses to stay in the air for a longer period of time, thus being inhaled into the respiratory tract by the human body and causing viral infections. Therefore, opening windows for ventilation can help prevent coronavirus infection. Windows should be opened regularly during virus epidemics. If the outdoor air is good, it is recommended to open the windows twice a day for about 30 minutes each time. If it is a cold winter, the window opening time can be shortened while keeping warm to prevent colds. If the indoor air is dry, it is recommended to install a humidifier, and usually drink more water to keep the mucous membranes of the respiratory tract moist and prevent upper respiratory tract infections.