We have heard a lot about the “New Normal” and what awaits us in the future. According to World Health Organization (WHO), since 2007 has warned about alarming statistics in terms of infectious diseases, viruses and the number of new diseases that have had outbreaks in recent years, as: SARS, MERS, Ebola, Chikungunya, Influenza and the most recent Coronavirus (Covid19); and as negative situations come to our eyes, scientists have turn to see another side, a technology whose time has come: UVC Light.
Here we’ll explain you a little bit about what its, how it works and its effectiveness against Coronavirus.
But, What is UV Light?
First things first, to get into context, we’ll explain what is UV Light.
As far as we know, UV Light is founded in nature, since it’s a form of electromagnetic radiation emitted by the sun, that spans 100-400 nanometers (nm), and is found beyond violet radiation on the visible light spectrum.
This radiation is divided by three different types, and none of them is visible by humans, but it is for some other organism who needs UV light for biological process. There’s UV-A and UV-B, which cause sunburn and signs of skin ageing like wrinkles and age spots, and even skin cancer. Artificial UV-A light is commonly used on UV Light Equipment for Flying Insects Control and UV-B is well known for medical applications such as the treatment of psoriasis and is also responsible for the formation of bone-strengthening vitamin D.
UV-C from the sunlight is filtered out by the Earth’s atmosphere. Exposure to certain wavelengths of UV-C radiation is hazardous to the skin and eyes of humans and animals. Despite this, UV-C lighting, when designed properly, installed correctly with safety instructions followed, is a safe and highly effective form of disinfection.
Is this “new” technology safe and trustworthy?: The history of UVC Light.
Is very common that when an unknown technology presents itself to the world as a solution, some doubts arise, however, for the peace of mind of many, it is necessary to clear out that UV-C technology is not new, but quite the opposite, it is a technology whose discovery was made in 1898 by scientists Arthur Downs &Thomas P. Blunt, who made their first publication describing the sterilization process of bacteria being exposed to UV-Light. In 1903, Niels Finsen was awarded with Noble Prize in Medicine for the use of UVC Light for the treatment of Lupus Vulgaris and Tuberculosis.
From the year 1910 in France emerge publicly its application for air and water disinfection and by the year 1985 more than 1500 water treatment plants with UVC Light emerge trough all Europe.
As time goes by, UVC Light costs have dropped significantly, allowing to expand its application for decades in different industries, as food, water and air disinfection and hospitals sanitization.
How does it work?
UV-C radiation has a direct action of photolytic degradation above the DNA of any microorganism, in this case against virus, bacteria, mold and spores, killing or inactivating it in a short time under correct dose.
It is important to emphasize that UVC Light must only been used to disinfect surface and places and should not be in direct touch to humans, animals and plants, since can be harmful to the eyes and skin.
In actual times, sanitize and disinfection UVC Light system have gained importance due to the growing statics of infectious diseases around the world that threaten public health, mainly now due Coronavirus (Covid19) pandemic.
A lot of times we have wondered, How will this problem be solved? If travels, routine activities, the use of public places and transportation won’t decrease and that will cause disease to spread if we don’t have strict hygiene measures.
During the last months we have limited ourselves to an expensive, ineffective and even toxic disinfection with long-term damage to our body. And that’s where the UV-C Light arrives to help us solve a large part of the problem.
UV-C Light vs. Covid19 (Coronavirus)
Let’s say we get to the icing of the cake of this technology, because we have talked about its multiple uses and benefits for disinfection of areas, but … Does it work against Covid19 (Coronavirus)? The answer is yes.
In medical tests conducted in conjunction with Signify (Philips) and Boston University, the results were:
- UV-C lighting as effective in inactivating SARS-CoV-2, the virus causing Coronavirus (COVID-19) at a dose of 5mJ/cm2, resulting in a reduction in the virus of 99% in 6 seconds. Based on the data, it was determined that a dose of 22mJ/cm2 will result in a reduction of 99.9999% in 25 seconds.
To sum up
UV-C light arrived to stay, cause until now is the best sanitize tool for disinfection of any kinds of areas, avoiding toxics and chemicals that could damage permanently our system, it sanitizes in a few minutes and can be used periodically while humans or animals are not in the area. Besides of having a huge degree of efficiency.
Some countries like China, USA, among others have started to use UVC light for sanitization and disinfection of public transport, hospitals and public places.
UV-C light is seen as a long-term solution in terms of disinfection and hygiene that will be required from now on in the New Normal.
Wait for more information of UV-C Light on our web and Social Media!
Pattie, N. (2020). UV-C Light explained. EE.UU. SIGNIFY: www.signify.com
Pattie, N. (2020). UV-C and safety. EE.UU. SIGNIFY: www.signify.com