AJIC: Heavy! UV rays with wavelengths of 222nm were found for the first time or could effectively kill SARS-CoV-2!

6, 2020 // -- In a recent study published in the international journal American Journal of Infection Control, scientists from Hiroshima University and other institutions found that using ultraviolet light (UVC, a safe range for human use) with a wavelength of 222 nm could be used to effectively kill the SARS-CoV-2 virus.
Photo Source: Hiroshima University So far, other studies involving 222 nm UVC (Far-UVC) have only confirmed the potential of the wavelength of ultraviolet light in the removal of seasonal coronavirus, which is structurally similar to SARS-CoV-2, but does not trigger COVID-19, a nanometer equivalent to one billionth of a meter.
in-body study, the researchers found that exposure to 30 seconds of light intensity of 0.1 mW/cm2 222 nm of UVC or 99.7% of SARS-CoV-2. In the
paper, the researchers used 222TM chlorinated cyanocyte lamps produced by Ushio to first spread the virus-containing 100 microliters of solution to a 9 cm sterile polystyrene board, then dry it in a biosecurity cabinet at room temperature, and then place it 24 cm away from far-UVC UV lamps.
researchers say ultraviolet light with a wavelength of 222 nm does not penetrate the outer layers of the human eye and skin, so it does not damage living cells in the body, making it a safe and effective alternative to the destructive 254 nm UV lamp, making it more used for disinfection in some health care facilities.
Because 254 nm of UV rays can damage exposed human tissue, it can only be used to disinfect and clean empty rooms, but 222 nm of UV rays is expected to be used as a new disinfection measure in occupied public places, including hospitals where hospital infections may occur.
The researchers said they would continue to study in depth later to assess the safety and effectiveness of 222 nm of UV-killing SARS-CoV-2 in the real world, and their current study only analyzed the effectiveness of UV in-body studies of this wavelength.
() Original source: Hiroki Kitagawa et al, Effectiveness of 222-nm ultraviolet light on disinfecting SARS-CoV-2 surface disin, American Journal of Infect Control (2020). DOI:10.1016/j.ajic.2020.08.022.