The new coronavirus can be spread through respiratory droplets, which are spread over a short distance, generally within 1-2 meters, and do not float in the air for a long time. If neighbors are far from their homes, opening windows is not a big problem. However, if the neighbor’s home has a confirmed or suspected case at home isolation observation, and with two windows next to each other, the neighbor is coughing into the window, at this time to open the window ventilation may produce the risk of infection. If it is in a densely populated neighborhood, it is not recommended to open the windows frequently for ventilation. It is advisable to choose to open the windows for half an hour regularly when there is less personnel activity, but attention should be paid to temperature changes to avoid catching a cold.