Yes, Covid-19 is transmitted through indoor air.

According to the Centers for Disease Control Prevention (CDC), SARS-CoV-2 circulates in the air as part of particles of various sizes, such as droplets and aerosols, and remains suspended in the air for hours” (October 05, 2020). (1)

An AP-AC UVGI sterilization product disinfects the ambient air, preventing airborne transmission of the SARS-CoV-2 virus between people.

In medical studies, a distinction is traditionally made between "droplets" (greater than 5 micrometers) and "aerosols" or "microdroplets" (less than 5 micrometers), however, the size distribution of particles created by breathing, coughing or sneezing varies and as the water they contain evaporates. shrinks.

Both droplets and microdroplets have viral loads of all particle sizes.

People infected with SARS-CoV-2 emit virus-containing droplets and micro-droplets when they talk, cough, sneeze, or simply breathe. While some droplets settle more quickly, some droplets can remain suspended in the air for hours or days. The SARS-CoV-2 virus can remain active in the air for more than three hours.(2)

The concentration of microorganisms in the air may be high in closed environments where the density of sick people is high. A study based on contact tracing in Japan concluded that the risk of infection is 19 times more likely indoors than outdoors.(3)

(1) https://www.cdc.gov/coronavirus/2019-ncov/more/scientific-brief-sars-cov-2.html

(2) Van Doremalen et al., 2020. Aerosol and Surface Stability of SARS-CoV-2 as Compared with SARSCoV-1. The New England Journal of Medicine.

(3) Nishiura et al., 2020. Closed environments facilitate secondary transmission of coronavirus disease 2019 (COVID-19).