Pathogens are organisms, such as viruses, bacteria, fungi or parasites, that can cause infection and life-threatening disease. The transmission of infection occurs within the built environment through air and surfaces. It is critically important to address both contamination sources when evaluating disinfecting options.
UV Light for Disinfecting
Light is comprised of different wavelengths, each with their own unique properties. The germicidal properties of ultraviolet (UV) light, part of the non-visible spectrum, can be harnessed to effectively disinfect the air, water and surfaces. At the appropriate wavelength and fluence (dose), exposure to ultraviolet light modifies or destroys the genetic material (DNA and RNA) in viruses, bacteria and mold, preventing replication.
UV Effectiveness and Safety
The effectiveness of UV on inactivating or destroying microbes depends on the microorganism’s structure, size and resilience, in addition to the UV exposure parameters including duration of exposure, wavelength and intensity (see SCIENTIFIC SUPPORT).
UV-C (231-280nm) must be shielded from humans as it poses a carcinogenic safety risk. Continuous low doses of Far UV-C (200-230nm) have been studied and no human effects reported (see SCIENTIFIC SUPPORT).
ViriShield disinfecting products have been designed to maximize effectiveness and safety of use.