Ultraviolet radiation is a form of light and can be divided into:
Ultraviolet (UVC) is germicidal, meaning that it is very effective in killing microorganisms such as surface or airborne bacteria and protozoa. It destroys the DNA of viruses and therefore it prevents them from infecting and reproducing.
Ultraviolet radiation technology prove effective in eliminating coronavirus from surfaces and, potentially, air and water. «UV light shows a lot of promise: SSLEEC member company Seoul Semiconductor in early April reported a "99.9% sterilization of coronavirus (COVID-19) in 30 seconds" with their UV LED products.»
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Bacteria are microscopic living organisms, usually one-celled that can be dangerous and cause infections, such as E. coli that can cause gastrointestinal disease. Airborne transmission is an escalating concern.
A virus invades living cells and uses their chemical machinery to keep itself alive and to replicate itself. They can be highly infectious. Viruses can quickly spread through contaminated water and airborne droplets.
Endospores are non-reproductive structures that develop inside bacteria. They surround themselves with durable coats of protein that allow them to survive in hostile environmental conditions. They are commonly found in water, where they may survive for long periods of time.