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Thread: Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseas

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    Administrator Islander's Avatar
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    Default Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseas


    David Welch, Manuela Buonanno, Veljko Grilj, Igor Shuryak, Connor Crickmore, Alan W. Bigelow, Gerhard Randers-Pehrson, Gary W. Johnson & David J. Brenner

    Scientific Reports
    volume 8, Article number: 2752 (2018)

    Abstract

    Airborne-mediated microbial diseases such as influenza and tuberculosis represent major public health challenges. A direct approach to prevent airborne transmission is inactivation of airborne pathogens, and the airborne antimicrobial potential of UVC ultraviolet light has long been established; however, its widespread use in public settings is limited because conventional UVC light sources are both carcinogenic and cataractogenic. By contrast, we have previously shown that far-UVC light (207–222?nm) efficiently inactivates bacteria without harm to exposed mammalian skin. This is because, due to its strong absorbance in biological materials, far-UVC light cannot penetrate even the outer (non living) layers of human skin or eye; however, because bacteria and viruses are of micrometer or smaller dimensions, far-UVC can penetrate and inactivate them. We show for the first time that far-UVC efficiently inactivates airborne aerosolized viruses, with a very low dose of 2?mJ/cm2 of 222-nm light inactivating >95% of aerosolized H1N1 influenza virus. Continuous very low dose-rate far-UVC light in indoor public locations is a promising, safe and inexpensive tool to reduce the spread of airborne-mediated microbial diseases.

    Keep reading:https://www.nature.com/articles/s41598-018-21058-w
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    Moderator Julieanne's Avatar
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    Default Re: Far-UVC light: A new tool to control the spread of airborne-mediated microbial di

    This was what I suggested last year might work on the outbreak of?? I can't remember the name of the virus/bacteria, but it was lethal and resisted every attempt to kill it off. It apparently 'stuck' to everything in the hospital room - I mean everything. Does anyone remember what it was and what happened to it?
    Last edited by Julieanne; 2 Weeks Ago at 02:28 PM.

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    Default Re: Far-UVC light: A new tool to control the spread of airborne-mediated microbial di

    Julieanne, I believe that was the terrifying fungus, Candida auris. Perhaps COVID-19 has bumped it off the front pages.


    https://www.hawkeshealth.net/communi...ighlight=auris

    https://www.hawkeshealth.net/communi...ighlight=auris

    https://www.hawkeshealth.net/communi...ighlight=auris

    A quick Google search shows that the most recent article appeared on July 23, 2019: https://www.statnews.com/2019/07/23/...big-questions/
    Last edited by Islander; 2 Weeks Ago at 06:44 PM.
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    Veteran Member Maurya's Avatar
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    Default Re: Far-UVC light: A new tool to control the spread of airborne-mediated microbial di

    Most of us are familiar with the chart showing the natural distribution of UVA rays and UVB rays throughout the day, with the natural peak of both occurring at local apparent noon. As yet I have not been able to find any source showing where UVC rays would fall within these natural curves. Has anyone else found such information?

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    Moderator Julieanne's Avatar
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    Default Re: Far-UVC light: A new tool to control the spread of airborne-mediated microbial di

    Thanks Islander, that's the one - though it was never actually on the front pages!

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    Default Re: Far-UVC light: A new tool to control the spread of airborne-mediated microbial di

    A Facebook friend helped me to understand UV-C. " The technology is old. Deli cases use a UV light to keep bacteria counts down. Hospitals sterilize with UV-C and have for decades. Rich backpackers carry a UV light smaller diameter than a pencil that, dipped in a bottle of water for a couple minutes will kill bacteria. UV lamps can produce ozone that, in high concentrations is harmful to the lungs. Not all do that. Sample units at Best Buy. https://www.bestbuy.com/site/shop/uv-air-purifier

    "UV air purification has been built into air handling for offices and commercial spaces for a long time. Household units are available as furnace and a/c accessories, and high power units are used in hospitals as this 2014 video shows. It is a good tool for decontaminating spaces and air if you can afford it and have a good use for it. Clorox and Lysol are cheaper for surfaces and 6' distance for air. Also, it takes a while to work so you can't have an ultraviolet filter on your face mask.
    https://www.youtube.com/watch?v=QTHKTlH7OWM"
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