Novel coronaviruses are transmitted by contact and droplets. Droplets are heavy and cannot float in the air, and the virus does not drift independently from carriers, such as blood, body fluids, saliva, droplets, etc. In a daily ventilated environment, novel coronaviruses are generally not present in the air. Usually droplet transmission is only realized when there is close contact with the infectious source. It is recommended to keep a distance of more than 1 meter when talking and not to let down your guard during epidemic prevention, but there is no need to over panic.