The idea that ultraviolet can destroy pathogenic bacteria is not new: Humans first learned about its disinfectant properties in 1878 when ultraviolet was actively used in hospitals and factories. In the future, the beneficial properties of ultraviolet radiation were used to destroy microbes living in tap water, which proved to be resistant to chemical disinfectants such as chlorine. When the need for frequent disinfection due to an outbreak of coronavirus infection has increased significantly today, the demand for the purchase of UV devices has become one of the main trends among users of the Western Internet. However, is it true that ultraviolet light can kill a corona virus or other infection and is it safe for humans?
Ultraviolet radiation is an invisible part of sunlight, which is divided into three types. Type A ultraviolet has the longest wavelength and can penetrate the base layer of human skin. Type B ultraviolet has a medium wavelength and causes sunburn. Type C ultraviolet has a minimal wavelength and is used for welding metals. It has been scientifically proven that ultraviolet radiation can destroy microbes.
UV light damage
Ultraviolet light, which was first discovered by German physicist Johann Wilhelm Ritter in 1801, is a unique electromagnetic radiation that can destroy harmful bacteria. Ultraviolet radiation is an essential part of sunlight and affects not only the bacteria around us, but also the general well-being of a person. So it is known that a person with a chronic deficiency of ultraviolet sun radiation suffers from chronic depression and their health gradually leads to serious mistakes.
But is it true that using ultraviolet light can protect us from the rapidly spreading COVID-19 infection? And if so, can the usual sunny weather defeat the epidemic?
As you know, sunlight contains three types of UV radiation. First, it is UV-A radiation that makes up the majority of the ultraviolet radiation that reaches the earth's surface. It is known that UV-A can penetrate deep into the skin and is the main cause of wrinkles and age spots.
Warning: UV-A radiation is used in tanning salons, but its intensity is more than ten times higher than usual solar radiation. Be extremely careful and attentive when visiting tanning salons. And it is better not to do this at all because long and intense exposure to UV radiation is harmful to health.
Abuse of UV-B radiation can damage our skin and often leads to sunburn and even skin cancer, writes bbc.com.
The third type of ultraviolet radiation – UV-C – consists of the shortest light wave and can destroy the genetic material of humans and microorganisms. Fortunately, ozone in the atmosphere effectively filters out UV-C radiation long before it reaches our sensitive skin. However, scientists have learned to use this type of ultraviolet for purposes that are useful to humans – for example, for welding metals.
Although there are no studies to investigate the effects of UV-C on COVID-19, ultraviolet light is widely used in China to disinfect surfaces in the most visited public places and hospitals.
Although UV-C is currently used almost universally, its improper use can lead to burns just a few seconds after the start of operation. The sun has been, and still is, a much safer and more natural way to disinfect surfaces whose light is still used to sterilize water and which is even recommended by the World Health Organization as a means of killing harmful bacteria. As an example, scientists cite the increasing cases of influenza in Brazil that occur in local forest fires when smoke dilutes the sun's ultraviolet radiation.
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A recent study showed that the longer the flu particles were exposed to concentrated sunlight, the weaker their infectious properties became. Unfortunately, no one currently knows whether the sun's ultraviolet radiation can affect the coronavirus in a similar way, so its potential use in real life can be extremely problematic. So we don't know how much time it takes to destroy COVID-19 using sunlight and how much energy it can take. In addition, disinfecting human skin with ultraviolet radiation causes significant damage, increasing the risk of skin cancer.
Once the virus is in your body, even the largest dose of ultraviolet radiation can no longer help treat the infection.
We at Hi-News.ru have already spoken about the fact that there are a variety of methods for treating surfaces for disinfection. In this article, you will learn how to protect yourself and your family from infection.