Under the epidemic situation, many communities have set up atomization epidemic prevention and disinfection channels. On February 16, the Center for Disease Control and Prevention of Hefei City issued a reminder that the establishment of atomized epidemic prevention and disinfection channels or the direct disinfection of normal outgoing citizens, bicycles, car bodies and wheels with disinfectants is an over-disinfection, which not only fails to achieve the corresponding effect, but also will cause harm and pollution to humans, animals and the environment, and there is even a potential risk that cannot be quantitatively evaluated.
How can we achieve “moderate disinfection” scientifically? Hefei disease control experts said that the main route of transmission of the new coronavirus is droplet and contact transmission. This means that the new coronavirus is concentrated in cases where the droplets of patients or asymptomatic infections can reach, usually within 1 meter, and in places where hands often touch (such as armrests, seats, door handles, elevator cars, buttons, Escalators, desks, shared telephones, handlebars, steering wheels, etc.) or locations (indoor environment where patients have stayed, elevators), etc. It only makes sense to target the places where the virus “stays” for disinfection. For places where there are no cases or asymptomatic infections, cleaning and hygiene are usually the mainstay, supplemented by preventive disinfection. Disinfection is only needed in cases where asymptomatic infections occur, or because of an increased risk of intensive activity in a population.
Hefei Center for Disease Control and Prevention experts reminded that large-scale disinfection of outdoor environments, such as the use of aircraft, drones, spraying vehicles and other equipment on streets, communities, parks, squares, not polluted by vomit, secretions, excreta Spray disinfection on public grounds or green plants; use ultra-low-volume sprayers to disinfect air in the outdoor environment; set up atomized epidemic prevention and disinfection channels or directly disinfect people who normally go out, bicycles, car bodies and wheels; the use of high-concentration chlorine-containing disinfectants (effective chlorine concentration greater than 1000mg / L) for preventive disinfection in ponds, Reservoirs, artificial lakes and other environments ;are all over-disinfection
Experts said that the use of effective concentrations of chemical disinfectants will cause great damage to human skin, eyes, and respiratory tract, and corrosion to automobile parts. Therefore, over-disinfection not only does not have a corresponding effect, but also causes pollution to humans, animals, and the environment.