The 222nm excimer far UVC light can kill the coronavirus and is harmless to the human body? Columbia University has submitted preliminary results

Since the outbreak of the new type of coronavirus pneumonia, various forces around the world have invested in research on disinfection and sterilization technologies. Research on whether deep ultraviolet can kill the coronavirus has been ongoing, and there are already some studies that prove that UVC technology can effectively kill the coronavirus.

For example, Violeds UV LED technology has been proven to successfully kill 99.9% of new coronaviruses within 30 seconds. In addition, a sterilizing high-power UVC LED lamp released by Atomic Blue, a Texas LED company, has been tested by the National Institutes of Health in a high-standard laboratory. It disinfects N95 masks and steel surfaces and can eliminate 99.9999% of the Novel coronavirus.

Recently, according to foreign media reports, a test conducted by Columbia University in the United States also showed that far-UVC (far-UVC) light can kill the coronavirus on the surface within a few minutes.

The report shows that the research team at Columbia University's Radiology Research Center is conducting experiments on far UVC light. According to the researcher, the far UVC wavelength is 222nm, which is safe for the human body, but it can still kill the virus.

David Brenner, head of the research center, said that far UVC with a wavelength of 222nm cannot penetrate the skin surface or eyes, which means it can be used in closed and crowded spaces with a high risk of pollution, and has great potential in the current novel coronavirus pneumonia epidemic. Come in handy during the period.

222nm far uvc

It is reported that as early as 2013, the Columbia University team began to study the disinfection effect of far UVC on drug-resistant bacteria. After that, the research team studied the effects of far UVC on influenza viruses and other viruses, and only recently began to turn their attention to coronaviruses.

Brenner said that they started the experiment three or four weeks ago and have determined that far UVC light can kill the coronavirus on the surface within a few minutes.

Next, the research team plans to test whether the far UVC lamps can kill viruses suspended in the air, such as those transmitted when an infected person coughs or sneezes.

At the same time, they will also test to confirm whether the light is harmless to the human body. For 40 weeks, the laboratory exposed mice to far UVC light for 8 hours a day, five days a week, and the intensity was 20 times that of humans. After testing the mice's eyes and skin, the research team found that the mice did not show any abnormal reactions. The experiment will continue for more than 20 weeks.

At present, although the research team has submitted preliminary results to the journal Nature, the research results cannot be fully confirmed by the scientific community until all the remaining steps are carried out.

In addition, a report in April showed that Kobe University in Japan and Ushio, a Japanese LED component manufacturer, also proposed that UVC radiation with a wavelength of 222nm is harmless to human skin and eyes.

The research of the two parties found that in terms of the ability to eliminate bacteria on the skin, the bactericidal effects of deep ultraviolet light with wavelengths of 222nm and 254nm were equivalent. At the same time, after testing on mice, it was also found that UVC light with a wavelength of 222nm did not affect the skin and eyes of mice. Have an adverse effect.

In fact, there are still many disputes in the industry that UVC light can kill coronaviruses and that UVC light with a wavelength of 222 nm is harmless to humans. People from all walks of life are paying great attention to this and expect more and more detailed studies to prove these results.

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