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Desperation is rarely a good starting point for innovation. When people are desperate they rush, cut corners, and have a tendency to ignore inconvenient facts that might get in the way of their progress.
Thanks to Discover Magazine for this story. If you're tempted to rush out and buy a Far UVC 'portal' for your customers to walk under on the way into your premises, please think again. Here's why.
'Experimental' entryway lighting takes hold in NYC
On the face of it, it sounds fine. Two New York bakeries in New York have fitted experimental lighting in their entrances to disinfect pathogens. Good idea. But look closer and the metal detector-like arch or 'portal' they've fitted above their doorway actually douses shoppers in Far UVC rays, a temporary measure they hope to replace with special Far UVC light bulbs.
Research shows Far UVC light does a very good job of trashing the RNA and DNA inside pathogens like Covid, leaving human skin 'relatively unharmed'. On the other hand many experts are worried. While the USA's Federal Drugs Administration – the FDA – allows UVC disinfectant devices in healthcare settings during the COVID-19 emergency, there's very little research about the effects of long term exposure on human eyes and skin. This is especially important since we know for sure that other kinds of UV light do damage the tissues of humans and other living creatures.
Experts 'shocked' to see the portal used in public
One environmental engineer at the University of Colorado, in Boulder, confessed to being 'shocked' to see the tech available for use in public spaces. With no long-term research to show the light causes no harm, it seems crazy to just assume it doesn't. As he said, “it could be an application that could have some dangerous side effects or direct effects.”
We know UVC degrades genetic material so badly it means pathogens can't reproduce. Sadly the light doesn't discriminate. UVC can damage human genetic material just as effectively as that of a virus. Some UVC wavelengths are associated with skin cancer and cataracts, which is why sanitation procedures using the light are only used when a space is empty of people.
On the other hand Far UVC light is supposed to be the exception to the rule, according to the Columbia University research team. They say the Far UVC wavelength range is very narrow, and seems to be absorbed by the top, always-dead layers of the eyes and skin. The dead cells effectively protect the living cells underneath. This means a person standing under a Far UCV light wouldn't be harmed, but the particles of virus they breathed out would be rendered harmless.
So far, so good. The trouble is nobody – so far – has examined what happens to humans when they are exposed to a lot of Far UVC light. One study used mice, finding that rodents who sat under the rays on and off for ten weeks didn't develop cancers. But mice and humans are very different and we can't safely draw conclusions from a single animal study, even though the results are being treated as “reassuring.”
Vital questions left to answer
It's important to be certain. No matter how urgent or desperate the matter is, we should never use tech in public spaces that may cause harm to humans. How about workers who have to stand under the lights for hours on end, for long shifts? What about people who suffer pre-existing skin or eye conditions? And aside from the potential damage to health, what happens when people start to sue the businesses that put them at risk and damaged their health? Things could soon get ugly, especially in the famously-litigious United States.
The Far UVC portal - Described as 'stupid' by one scientist
Many experts feel the evidence for these Far UVC 'disinfecting portals' you walk through doesn't stack up. One even calls it 'stupid'. Ed Nardell is an infectious disease researcher with Harvard Medical School, and an expert in UV light. He says a device that someone has to walk through just doesn't make sense. In his words, “If the intention is to somehow render the customer less infectious, or to protect them from having been infected on the way out, [it] is — there’s no other word for it — stupid.”
How come it's 'stupid'? One, because shining such tiny amounts of UV on your body, face and hands for just a couple of seconds won't disinfect much. Two, when an infectious person breathes the pathogen out after walking through the portal they still release particles of virus close to other people. Three, simply because the portal is 'a bad application of really good technology'.
Our lights are science fact, not science fiction
Scientists believe Far UVC can be highly effective against the virus. But the idea that you can simply walk under it and be safe from infection is nothing more than 'science fiction'. Our UVC lights, on the other hand, are proven to work, and come with clear instructions to stay safely out of a space while it's being disinfected. We even train you to use the tech safely. Want to know more? Let's talk proper science!