Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.
UV-C falls within the ultraviolet light spectrum, it is not naturally found on the surface of the earth like other forms of light. This is because the Ozone layer blocks UV-C from entering the earth’s atmosphere.
A substance or agent that kills germs, especially pathogenic microorganisms; a disinfectant.
Ultraviolet germicidal irradiation (UVGI) is the use of ultraviolet energy to kill or inactivate viral, bacterial, and fungal species. The disinfection properties of ultraviolet lighting have been known for over 140 years, since Downes and Blunt discovered the antibacterial effects of the shorter wavelengths of sunlight. Shortly thereafter, it was proven that the UV portions of the light spectrum were able to destroy microorganisms.
UV-C works using a photolytic effect whereby the radiation destroys or inactivates the microorganism so that it can no longer multiply. For DNA, it does this by causing adjacent thymine bases to form a chemical bond thus creating a dimmer. If a sufficient number of these bonds are created, DNA cannot replicate.
Based on existing evidence, we believe so. Here’s why: All bacteria and viruses tested to date (many hundreds over the years, including other coronaviruses) respond to UV-C disinfection. Some organisms are more susceptible to UV-C disinfection than others, but all tested so far do respond at the appropriate doses. UV-C has been shown to achieve a high level of inactivation of a near-relative of COVID19’s virus i.e SARS-Cov-1 and MERS-CoV.