Ultraviolet light may reduce COVID-19 transmission indoors

Initial infection rate in US may be 80 times greater than reported
Washington: The number of early COVID-19 cases in the US may have been more than 80 times greater, and likely doubled nearly twice as fast as originally believed, according to a study which says the undercounting may have been due to testing issues, and the prevalence of asymptomatic individuals.

London, Jun 23 (PTI):
Using ultraviolet (UV) light to inactivate the SARS-CoV-2 virus may be an efficient, easily deployable, and economically affordable method to reduce COVID-19 transmission in indoor spaces, according to a study.
The study, published in the journal ACS Nano, analysed the currently available UV-C sources, such as fluorescent lamps, microcavity plasmas, and LEDs.
It noted that by irradiating this type of light inside the ventilation systems of buildings and in shared indoor spaces while not in use, it is possible to quickly and efficiently deactivate airborne and surface-deposited SARS-CoV-2 viruses that cause COVID-19.
The researchers, including those from CFO – The Institute of Photonic Sciences in Spain, also explored costs and investments in deploying such technology.
They explained that a global capital investment of a few billion dollars in UV-C sources could protect indoor workers worldwide.
A long series of studies suggest that virus transmission in indoor spaces has a much higher transmission rate than outdoors, the researchers noted.
Filters and chemicals have been presented as possible solutions to minimise this problem, they said.
However, even though these are efficient solutions to reduce the concentration of contaminated particles and droplets through ventilation systems, their installation may be costly and time-consuming, according to the researchers.
In addition, chemicals such as ozone are very effective for virus disinfection, but if misused they are harmful for humans, they sad.

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