A study by university researchers in the US shows ceiling fixtures emitting a safe form of UV light would be very efficient in killing airborne coronaviruses.
The Columbia University researchers put coronavirus particles into little droplets and floated them in the air in front of far-UVC lights, then collected the viruses and tested them to see how many were still active.
"A very low exposure to far-UVC light killed well over 99.9 per cent of the exposed virus," lead researcher Dr David Brenner told Reuters.
The study, published yesterday in Scientific Reports, used coronaviruses that cause common colds. "But in our subsequent ongoing studies we have found that the coronavirus that causes COVID-19 is killed in just the same way by far-UVC light," Dr Brenner said.
The idea would be to install overhead far-UVC lights in public locations, where they would be "continuously killing microbes, including the COVID-19 virus - and so limiting the spread of the virus," Dr Brenner said, adding that far-UVC manufacturers are already ramping up production.
"We don't see far-UVC light as an alternative to masks and social distancing. "We see it as a new extra weapon that we can use in the battle against COVID-19."
In April, US President Donald Trump suggested exposing infected COVID-19 patients to UV lights as a potential treatment.
But there is no suggestion the study findings would be applicable as a treatment, as it only targets airborne viruses or those on surfaces.
No amount of UV light is proven to impact the virus inside the human body.
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Source: 9News https://www.9news.com.au/world/coronavirus-uv-light-efficient-in-killing-airborne-viruses-study-finds/8f294f02-c838-4f3a-bcb5-409c1526b579