China using Far-UV to prevent covid spread

China using Far-UV to prevent covid spread. By David Evans.

FAR-UVC ultraviolet light — which is safe to use around people — kills 99.9 per cent of coronaviruses in the air, a study has found.

Crucially, far-UVC at 222 nanometres isn’t harmful to people, unlike conventional UV-C at 254 nanometres, which is the wavelength of most of the lamps produced by the lighting industry.

Scientists at Columbia University Irving Medical Center in New York say that more than 99.9 per cent of seasonal coronaviruses present in airborne droplets were killed when exposed to far-UVC.

Far-UVC’s wavelength ranges between 207 and 222 nm, which the study reveals “efficiently kills pathogens potentially without harm to exposed human tissues.” Researchers say far-UVC can’t break through the tear layer of the eye, nor penetrate the outer layer of dead cells on skin.

Survival of the fittest? If covid is truly harmful and chronic, the Chinese are way out in front:

hat-tip David Archibald