Scientists have been using the disinfectant properties of UVClight for decades. And it is now considered an ever-important factor in the fight against Covid-19.
Although many studies have been conducted regarding the use of UVCs on the SARS-CoV-2 virus, many questions are still being raised. How do UVC rays kill viruses and bacteria? Are these rays safe for our health? We explain all of this in this article.
How do UVC rays affect viruses and bacteria?
UVC rays kill or inactivate microorganisms through the destruction of nucleic acids. UVCs act on the DNA and RNA of microorganisms directly, and thus modify them. (1)
When a microorganism is exposed to UV rays, the cell nucleus is modified through the Photolytic process. It is then unable to enter the phase of cell division, and thus reproduction.
Several factors are needed for optimal UVC effectiveness:
- The duration of exposure of a microorganism;
- The intensity of exposure to UVC radiation;
- The wavelength of UVC radiation used.
The use of UVC rays has been widespread in laboratories for several years, but it is only recently that their use has been extended to a greater number of professionals. Indeed, it is now possible to use UVC devices in larger spaces such as airplanes, gyms or hospitals. (2)
Can UVCs kill Covid-19?
Although the impact of UVC rays on the SARS-CoV-2 virus was already alleged, no evidence had yet been established.
A recent study was able to certify the effectiveness of UVC rays against the Covid-19 virus. (3) Dr. David Brenner, in charge of this study, conducted the tests on SARS-CoV-2 samples and exposed them to UVC rays by measuring their effects after a certain time period of exposure.
Subsequently, numerous studies have supported these results. Using devices with Signify technology in particular, they were once again able to demonstrate the effectiveness of UVC rays on the SARS-CoV-2 virus,which is the origin of Covid-19. (4 ,5)
As we now know that the Covid-19 virus is capable of living more than 3 days on surfaces or in ambient air, these results are ever-important in the fight against the virus. And encourages the availability of these devices to a greater number of professionals directly exposed to the risk of the spread of Covid-19.
Are UVC devices safe for our health?
Like UVA and UVB rays, UVC rays are harmful to our health if we are exposed to them intensively and repeatedly. Indeed, exposure to them can damage the skin and eyes. This is why the use of UVC rays must be done with the utmost security by following the process time.
To ensure optimal safety of use, PuriTechs devices are equipped with a start-up countdown, as well as a presence detector during the activation of the decontamination process. This allows the user to decontaminate surfaces and ambient air easily and without putting their health at risk.
For more information about Puritechs devices.