A safer UV light effectively Inactivates virus causing COVID-19, study shows
An in vitro experiment by HU researchers showed that 99.7% of the SARS-CoV-2 viral culture was “Inactivated” after a 30-second exposure to 222 nm UVC irradiation at 0.1 mW/cm2. The study is published in the American Journal of Infection Control.
A wavelength of 222 nm UVC cannot penetrate the outer, non-living layer of the human eye and skin so it won’t cause harm to the living cells beneath. This makes it a safer but equally potent alternative to the more damaging 254 nm UVC germicidal lamps increasingly used in disinfecting healthcare facilities.
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- Hiroki Kitagawa, Toshihito Nomura, Tanuza Nazmul, Keitaro Omori, Norifumi Shigemoto, Takemasa Sakaguchi, Hiroki Ohge. Effectiveness of 222-nm ultraviolet light on disinfecting SARS-CoV-2 surface contamination. American Journal of Infection Control, 2020; DOI: 10.1016/j.ajic.2020.08.022
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