In general, it is recommended that persons with a history of close contact be isolated in a fixed location. If there happen to be other people in the neighborhood who are in home isolation, and the isolated person does not have a clear history of exposure and obvious discomfort himself, the risk of infection from neighbors opening windows for ventilation is minimal when home isolation is in place. If the situation permits, consider opening windows daily. However, it should be noted that the windows should not be opened too often and the temperature should be kept warm to avoid catching a cold. Content source: Dr. You Lai