UV-C and SARS CoV-2

Signify today announced that Boston University has determined that a Signify ultraviolet (UV) light source would almost always deactivate the coronavirus that causes COVID-19 if dosed at the right level.

The university’s National Emerging Infectious Diseases Laboratories (NEIDL) exposed materials containing the virus to a UV-C tube lamp from Signify. It found that a dose of 5 mJ/cm2 resulted in “a reduction of the SARS-CoV-2 virus of 99% in 6 seconds.” (SARS-CoV-2 is the more scientific name for the novel coronavirus).

The NEIDL team extrapolated that a stronger dose of 22 mJ/cm2 would result in a reduction of 99.9999% in 25 seconds.

“Our test results show that above a specific dose of UV-C radiation, viruses were completely inactivated: In a matter of seconds we could no longer detect any virus,” said team leader Anthony Griffiths, associate professor of microbiology at Boston University. “We’re very excited about these findings and hope that this will accelerate the development of products that can help limit the spread of COVID-19.”


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