A study carried out by researchers at the
University of Hiroshima
(Japan) has shown that the use of ultraviolet C light with a wavelength of 222 nanometers (nm) manages
to "effectively" eliminate
SARS-CoV-2, the virus that causes disease known as Covid-19.
Other studies involving this type of ultraviolet light have only looked at its potency to
eradicate seasonal coronaviruses
that are structurally similar to SARS-CoV-2, but not to the virus that causes COVID-19 itself.
Given this, Japanese researchers, whose work has been published in the 'American Journal of Infection Control', have developed an in vitro experiment that has shown that 99.7 percent of the SARS-CoV-2 viral culture
died after a 30 second exposure
to 222 nm ultraviolet light irradiation at 0.1 mW / cm 2.
This wavelength cannot penetrate the outer layer of the eye and the skin of the people, reason why the experts have assured that
it will not damage the living cells
that are underneath.
"This makes it a safer but equally powerful alternative to lamps used to disinfect sanitary facilities," the researchers concluded.
However, experts have highlighted the need for
further evaluation of the safety
and efficacy of irradiating this light to kill coronavirus on real-world surfaces, as their study only investigated its efficacy in vitro.
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