There is no danger in opening windows and ventilating the house during an epidemic; instead, opening windows and ventilating the house more often and staying away from closed places can also reduce the chances of spreading the virus. Everyday, you should reduce your outdoor activities, pay attention to personal hygiene, and open windows indoors frequently to ventilate and disinfect the room. It is not dangerous to open windows and ventilate during an epidemic. The virus is mainly transmitted by respiratory droplets and close contact, and may also be transmitted by aerosols in relatively closed environments. Therefore, opening windows frequently can reduce the chance of spreading the virus. In closed environments, such as elevators, movie theaters, etc., pay attention to maintain a safe distance to avoid conversation. During the epidemic, the following points should be noted: reduce the number of activities outside, reduce the number of activities in crowded public places; go out wearing masks, maintain hand hygiene; indoor ventilation and disinfection; take the initiative to do a good job in personal and family members of the health monitoring.