Health
Tests show UVC lamps can illuminate the path of virus fighting
NEW YORK (AFP) -Can a new type of UV lamp be used at stations, planes and schools to kill dangerous viruses and become a game changer in the battle of COVID-19?
Researchers at Columbia University have been working on such uses for years, and the current pandemics have been able to confirm the value of their efforts.
UVC lamps have long been used to kill bacteria, viruses and molds, especially in the hospital and food processing industries. This technology is booming as the coronavirus pandemic boosts the global economy.
However, UVC (ultraviolet C rays) are dangerous, cause skin cancer and eye problems, and can only be used when no one is there.
The New York subway system plans to use UV lamps to disinfect trains, following the example of the Chinese subway, but only at night when it is closed.
A team at the Radiology Research Center in Colombia is experimenting with so-called far UVC, where a wavelength of 222 nanometers is safe for humans but deadly for viruses, the center’s director David Brenner told AFP. I told him.
At those frequencies, he explained that light rays cannot penetrate the surface of the skin or the surface of the eye.
This means it can be used in dense, dense spaces where there is a high risk of contamination and it is very likely to be used during the current pandemic.
In late April, President Donald Trump made a confusing statement about somehow exposing humans to UV radiation to kill the coronavirus.
He appears to have been inspired by a federal study on the effects of natural light on viruses, but natural light lacks UVC rays.
In 2013, a team in Colombia started a study on the effectiveness of deep UV light against drug-resistant bacteria. Next, we looked at the use of rays against viruses, including the influenza virus. Most recently I turned my attention to the coronavirus.
“We were thinking, how can we apply what we are doing to the current situation,” Brenner said.
However, in order to test the effects of UVC on the highly contagious coronavirus, the team had to move the equipment to a very biosafe laboratory in Colombia.
Brenner said experiments conducted “3-4 weeks ago” have already shown that UVC rays destroy surface viruses within minutes.
The team then plans to test the lamp for airborne viruses, such as when an infected person coughs or sneezes.
In parallel, tests are being carried out to ensure that these rays are harmless to humans.
Currently, for 40 weeks, the laboratory has exposed mice to deep UVC radiation “8 hours a day, 5 days a week, at 20 times higher intensity than human use.”
result?
After testing the rodent’s eyes and skin, “We haven’t found anything at all. The mouse is so happy-and so cute,” Brenner said.
The experiment will continue for another 20 weeks.
Even if the team has already submitted preliminary results to the journal Nature, the findings cannot be fully verified by the scientific community until all the remaining steps have been carried out.
“The world has changed”
However, the pressure to restart the global economy is so high that the factory is accelerating the production of UV lamps without waiting.
“We really need something in situations like offices, restaurants, planes, hospitals,” Brenner said.
If UVC lamps have already been in commercial use for a couple of years, especially in the diamond industry, they can be used to distinguish between artificial and real gems, but potential customers are now in the army and produce them. The companies that are
“It’s a big deal,” said John Yerger, CEO of Eden Park Illumination, a small producer based in Champaign, Illinois.
But the pandemic “has changed the world a lot in the last three months,” he added.
The US Food and Drug Administration is also deregulating tools and drugs that can be used for disinfection and urging manufacturers to find solutions.
“Yes, there are thousands of these products (UVC lamps),” says Yerger. “The question is, will it be in the millions?”
Shinji Kameda, U.S. CEO of Japanese manufacturer Ushio, said, “We are seeing a vast array of lamps for airlines, cruise ships, restaurants, cinemas and schools. Volume of customer interest. “
The company’s 222 nanometer lamps sell for $ 500 to $ 800 and are already in use in some Japanese hospitals, he said.
Meanwhile, Brenner said he was losing sleep.
“I spend the night thinking-if this far UVC project started a year or two ago, I could have probably prevented the COVID-19 crisis,” he said.
“Not completely, but perhaps it could have prevented it from becoming a pandemic.”
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