Aerosols are all solid and liquid particles suspended in a gas (e.g., air). Aerosol transmission is only possible if the three conditions of confined space, prolonged exposure, and high concentration are met. It is important to note that aerosol transmission may occur during specialized medical operations, such as clinical tracheal intubation, and under special conditions. Clinical staff should pay attention to air isolation measures, such as wearing medical protective masks, goggles, etc. to prevent infection. The probability of aerosol transmission in the daily life of the public is not high, and the general public should not worry too much about it.