Scientists have long known that ultraviolet light can kill pathogens on surfaces and in air and water. UV robots are used to disinfect empty hospital
Can UV light clean indoor air to reduce the spread of Covid?
Far-UVC light (222 nm) efficiently and safely inactivates airborne human coronaviruses
Mythbusters
Can UV light clean indoor air to reduce the spread of Covid?
Optimized parameters for effective SARS-CoV-2 inactivation using UVC-LED at 275 nm
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