Novel coronaviruses are respiratory-transmitted infectious diseases, and the causative agent is a novel coronavirus. It is recognized that there are three main modes of transmission of novel coronaviruses, one is droplet transmission, the second is close contact, and the third is aerosol transmission, which may also play a significant role. Aerosol transmission is when the virus is suspended in the air as an aerosol. The length of time a virus survives in an aerosol is very closely related to the aerosol environment. For example, ambient temperature, humidity, and ventilation may affect the survival time of the virus. If the temperature is high, the survival time of the virus will be shorter. If the temperature is low, the survival time will be relatively long. If the ventilation is good, the concentration of aerosol content will be lower and the chance of infecting people will be less. Source: Dr. Yurai