Is UV light safe for humans?
Yes, UV Light that Is Safe for Humans but Bad for Bacteria and Viruses. ... The research team found that continuous low doses of far ultraviolet ( UVC LED) light can kill airborne of flu viruses without harming human tissues.
In the constant battle against the spread of infectious diseases, scientists are continually on the hunt for new weapons that specifically target pathogenic microbes. Now, investigators from the Center for Radiological Research at Columbia University Irving Medical Center (CUIMC) believe they may have found a new, low-cost solution to eradicating airborne viruses in indoor public spaces. The research team found that continuous low doses of far ultraviolet C (far-UVC) light can kill airborne flu viruses without harming human tissues.
Scientists have known for decades that broad-spectrum UVC light, which has a wavelength of between 200 to 400 nanometers (nm), is highly effective at killing bacteria and viruses by destroying the molecular bonds that hold their DNA together. This conventional UV light is routinely used to decontaminate surgical equipment.
“But because viruses and bacteria are much smaller than human cells, far-UVC light can reach their DNA and kill them.”
It proved that the use of overhead low-level far-UVC light in public locations would be a safe and efficient method for limiting the transmission and spread of airborne-mediated microbial diseases, such as influenza and tuberculosis, as well as the Coronavirus.