The mechanism of transmission of infection is a way of moving an infectious agent from an infected organism to a susceptible one. Each infectious disease has its own characteristic pathway of pathogen transmission, which was formed during evolution to preserve the pathogen as a species. The mechanism of pathogen transmission includes three phases: excretion of the pathogen from the host organism into the environment, presence of the pathogen in the environment, introduction of the pathogen into a new susceptible organism. The main mechanism for transmitting coronavirus infection is air-droplet (or air-dust), in which the pathogens are localized in the mucous membrane of the respiratory tract and transferred to the new body through the air. In this transmission path, the pathogen enters the external environment during sneezing and coughing with liquid drops and is introduced into the human body when inhaling air containing infected particles. If the particles are small, they are for some time in the air in the form of an aerosol (drops suspended in the air), and if the particles are larger, then they settle on various surfaces at a distance of up to two meters around the sick person. Very often these are frequent items: door handles, handrails in transport, mobile phones, etc. Touching his face, a person puts the virus on the mucous membranes of the nose, mouth, eye.