Novel pneumonia is airborne and is the predominant mode of transmission. Droplet transmission and close contact transmission are the two main modes of transmission of novel coronavirus pneumonia as indicated in the current guidelines. Of course, aerosol and gastrointestinal routes of transmission need to be further defined because viral RNA may be detected in aerosols and the gastrointestinal tract, but it remains to be proven whether the virus is viable and can exist alone as a route of transmission. Therefore, the novel coronavirus can be transmitted through the air, so it is important to have more ventilation, wash your hands regularly, and wear a good mask when you go out in general for self-isolation. The source of infection of novel coronavirus pneumonia seen so far is mainly people infected with novel coronavirus, including many asymptomatic infected people, who may also be the source of infection. So wearing a good mask when you go out is both for your own protection and for the protection of others. Content source: Dr. You Lai