It is possible for the downstairs to be infected when the upstairs is suffering from New Crown Pneumonia, although the chances of contagion are usually not great.
The main modes of transmission of neocoronavirus are droplet transmission, contact transmission and aerosol transmission. Because of the poor closure of sewer outlets, there is a possibility that the upper and lower floors may be infected through the bathroom sewer pipes.
General aerosol transmission distance reaches several meters, and the new crown virus in the aerosol can survive for several hours, can cause the same confined space in non-direct contact with people infected with the new crown virus, so if the upstairs and downstairs are open windows, do not rule out the existence of the possibility of infection, but the general chances are not great.
New coronavirus is very dangerous, it is important to actively do related preventive work.
Tip: In this article, “new coronavirus pneumonia” and “new coronavirus pneumonia” were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.