Aerosol transmission means that droplets gradually lose moisture in the process of air suspension and form droplet nuclei, which can float and move in the air in the form of aerosols to form long-distance transmission. Such as building or road even if no one around, you can smell the smoke, belong to the aerosol transmission. This is because the particles formed after the burning of tobacco in the air, which in turn forms an aerosol, gradually drift from a distance to, the smaller the particles, the longer they exist in the air in the form of aerosols. Generally 1μm particles can exist in the air for more than one hour. The droplets discharged by talking loudly, laughing or singing are less than 0.1μm in diameter, and quickly lose moisture and dry in the air within 1 second or even tens of milliseconds to form droplet nuclei, which can spread far away with the air. If the droplet nucleus contains coronavirus, it will also spread with the air and infect people at a distance after inhalation. However, there is no need to worry too much, even if there is coronavirus in the droplet nucleus, the amount of virus in the air decreases gradually as the distance of transmission is extended, and it is not so much that the human body becomes infected after inhalation. Content source: Dr. Yurai