copper has unique anti-viral properties and, in addition, can be infused in fabrics in interesting ways.pic.twitter.com/T1odR2R8wo
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And then there's "brass" which is actually a thin coat of vapor deposited zirconium nitride. Looks exactly like brass, but doesn't tarnish and isn't antimicrobial.
Both with brass and copper, the biggest cost for a hospital is probably the time spent cleaning them (as in Brasso). Still likely worth it.
Brasso (or any polish/cleaner that leaves a wax or film on the surface) is not recommended for antimicrobial applications, as the wax/film inhibits the contact of microbes with the copper material
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