Asymptomatic infections are transmitted mainly by proximate droplet transmission. Although there are no obvious clinical symptoms, they are still infectious if they test positive for nucleic acid.
Most asymptomatic infected persons are close contacts of novel coronavirus pneumonia and should be under strict medical observation or home isolation. It is important to control the source of infection, as the virus is transmitted mainly by droplet transmission as well as by contact. Therefore, to avoid infection, masks should be worn properly and close contact with others should be reduced.