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What is aerosol transmission?

Jan 02, 2024 Source: Cainiu Health
Dr. Yang Ziqi
Introduction
Under normal circumstances, aerosols refer to an air dispersion system composed of solid or liquid particles suspended in a gaseous medium, with particle sizes generally ranging from 0.01 to 10 micrometers. In the transmission of the novel coronavirus, aerosol transmission refers to pathogens floating in the air in the form of aerosols, remaining suspended for extended periods before mixing to form droplets, which, when inhaled by humans, can lead to infection.

In general, aerosol transmission refers to the spread of an aerosol dispersion system composed of solid or liquid particles suspended in a gaseous medium, with aerosol particle sizes typically ranging from 0.01 to 10 micrometers. A detailed analysis is as follows:

In the transmission of the novel coronavirus, aerosol transmission means that the pathogen floats in the air in the form of aerosols, remains suspended for extended periods, mixes to form droplets, and causes infection when inhaled by humans. Aerosol transmission of the novel coronavirus has two characteristics. First, the concentration of the virus via aerosol transmission is low, unlike direct transmission where concentrations are relatively high. The novel coronavirus does not survive easily once it leaves bodily fluids; ultraviolet radiation and free radicals in the air can reduce its virulence. Second, the likelihood of aerosol transmission is low and generally occurs only in enclosed or semi-enclosed spaces, primarily during close-range interactions. In poorly ventilated environments, continuous emission from infected individuals gradually increases the concentration of airborne coronavirus-laden aerosols. When the concentration and viability of the virus in these aerosols reach certain levels, the risk of disease transmission through aerosols becomes significant.

If patients experience discomfort, they should promptly seek medical evaluation and treatment at a正规 hospital to avoid delays in diagnosis and management.


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