In April of 2020, U.S. Air Force medical personnel got themselves a mask sanitizing box (aka ultraviolet germicidal irradiation machine), and you could build one yourself. The box can be used to sanitize other things as well, depending on how big you make it.
U.S. Air Force photo by Airman First Class Seth Haddix.
It simple; use some plywood or thick cardboard, cover it with reflective material like that found on an automotive ‘sun shield’ or construction industry reflective foil insulation, install some high intensity UV light fixtures inside the box, and voilà!
USAF photo by Airman First Class Seth Haddix.
This USAF UV box is being used at the Keesler Medical Center, Keesler Air Force Base, Mississippi.
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