Study finds UV disinfection solution is safe for human exposure

The study, led by Dr. Ryosuke Kuroda, chairman and professor of the Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, is the first study on the safety of 222 nm far UV-C light conducted on humans.

In this study, Ushio’s Care222 UV-C disinfection device irradiated 500 mJ/cm2 of 222 nm UV-C light on the back of 20 healthy volunteers aged from 20 to 80 years. The Care222 device includes an optical filter that eliminates radiation from wavelengths above 230 nm. Twenty-four hours after the irradiation, none of the participants showed any signs of erythema (redness of skin).

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