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What is UV light and can it kill the coronavirus? Here's everything you need to know - USA TODAY

What is UV light and can it kill the coronavirus? Here's everything you need to know - USA TODAY

What is UV light and can it kill the coronavirus? Here's everything you need to know - USA TODAY
Aug 03, 2020 1 min, 58 secs

UV light is being used to disinfect airplanes, hotels, subway cars and cruise ships, but Americans are skeptical.

While companies continue to use ultraviolet light to disinfect their airplane cabins, hotels, subway cars and cruise ships, the average American is skeptical.

How can light kill the coronavirus.

Airline companies, businesses, hotels and hospitals specifically use UVC light to disinfect surfaces and kill off viruses that chemicals might miss.

Jim Malley, professor of civil and environmental engineering at the University of New Hampshire, said germicidal UVC light has been used for decades to disinfect surfaces and kill viruses.

While studies have yet to confirm if UVC light is able to kill SARS-CoV-2, the virus that causes COVID-19, multiple studies have shown that it can kill other viruses including influenza and other seasonal coronaviruses.

Typical germicidal UVC light kills viruses at a wavelength of 254 nanometers.

If all the measurements line up, UVC light can kill 99.9% of viruses and bacteria.

It may also take a couple of cycles to disinfect a room depending on its size, the intensity of the light and the time of exposure.  .

"If it’s not going to harm your skin or eyes, it's not the right amount of UV energy" to kill viruses and bacteria, said Mark Beeston, vicepresident of sales and marketing at Vioguard, a UVC light tech company. ?

However, a recent study suggests there may be a spectrum of UVC light that kills viruses but isn't harmful to humans. ?

Researchers at Columbia University Irving Medical Center found that more than 99.9% of seasonal coronaviruses present in airborne droplets were killed when exposed to a wavelength called far-UVC light at 222 nanometers?

“Because it’s safe to use in occupied spaces like hospitals, buses, planes, trains, train stations, schools, restaurants, offices, theaters, gyms, and anywhere that people gather indoors, far-UVC light could be used in combination with other measures..

Good UVC light devices are difficult to perfect, yet it seems many companies are throwing their hats in the ring as consumers look for more ways to disinfect their living spaces. 

He said most devices that kill viruses and promote safe use are usually marketed towards hospitals or commercial laboratories

The Metropolitan Transportation Authority is expanding a pilot program to use a type of ultraviolet light to kill the virus that causes COVID-19

Experts urge customers to do some research before purchasing a UVC light devices

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