Aerosols are all solid and liquid particles suspended in a gas, generally ranging in size from 0.01 to 10 micrometers. Aerosol transmission refers to pathogens floating in the air in the form of aerosols, which are then inhaled by the human body and lead to infection. Aerosols are solid or liquid particles suspended in a gas that are generally 0.01 to 10 microns in size. Particles are ubiquitous in the air on which human beings depend for survival, constituting an “aerosol world”. Aerosol transmission refers to pathogens floating in the air in the form of aerosols, which are inhaled by the human body and lead to infection. Aerosol transmission occurs when pathogens are exposed to a localized aerosol system and are dispersed with the aerosol. Aerosol transmission is a long-distance mode of transmission, and once it occurs, the effects of an infectious disease are difficult to control quickly. In the event of an aerosol-borne infectious disease, it is important to take care of personal protection, go to fewer places where people gather; open windows and ventilate the room more often, and disinfect the room more often to reduce the possibility of spreading the disease. If there is an epidemic of infectious diseases around you, please go to the hospital in time to avoid delaying your condition when you become ill.