Neocoronaviruses generally refer to new coronaviruses. There are no authoritative data on how long neocoronaviruses can remain airborne, usually between minutes and hours. There are no authoritative data on how long novel coronaviruses stay in the air. The length of time that novel coronaviruses stay in the air varies under different temperatures and humidity levels, but is usually between several minutes and several hours. Since infection with novel coronavirus can induce novel coronavirus pneumonia, the population needs to take protective measures. Novel coronavirus can be transmitted by respiratory droplet transmission, close contact transmission and, in relatively closed environments, aerosol transmission. As the population is generally susceptible, so when you go out, you should wear a good mask, keep a meter distance from others, and also avoid places with large crowd movement. It is recommended that in daily life, open the windows and ventilation to maintain indoor air flow, appropriate temperature and humidity, and regular disinfection at home. Tips] In this article, “new coronavirus pneumonia” and “new coronavirus pneumonia” have been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.