Wearing a mask can block aerosol transmission. In addition to direct and contact transmission, there is also aerosol transmission. Aerosol transmission can generally be blocked by following the requirements of washing hands frequently, wearing masks, going out less, not partying, and ventilating more. Stable dispersion in the gas suspension of liquid and solid particles called aerosols, these particles and media wrapped together, with the medium of gas flow everywhere. For example, go to the road obviously around dozens of meters within the scope of no one, but also can smell the smoke, which is the tobacco burned after the formation of particles formed by the flavor, the smaller the particles in the air, the more pronounced viscous effect. And micron particles in the air is like sesame seeds sprinkled inside the honey, the settling speed is very slow. In conclusion, although aerosols are easier to form, it is not easy to infect people, generally in the working and living conditions as long as the correct masks are worn and protection is strengthened, enough to protect the average person from being infected by aerosols. Source: Dr. Yurai