Can ultraviolet light fight COVID-19?

While we all hope for a coronavirus vaccine, many of us are keen to go about our day-to-day lives again. Physical distancing and hand washing have helped limit the spread of the virus but can't prevent all forms of transmission, particularly indoors.

With the virus known to stay alive in the air for a number of hours – and on some surfaces, for days – a physicist at Columbia University is harnessing the power of light in an attempt to stop the virus before it infects.

David Brenner, who has developed a UV lighting system that can kill viruses including SARS-CoV-2, believes the technology and know-how already exists.

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