My high school back in the 70's had copper and its alloys all over. It's been "improved" for energy efficiency with stainless and aluminum.
Silver is good too. Not talking about colloidal silver. Silver coins and foil made from hammered silver coins work as a wound dressing. Copper applied that way could be toxic.
It’s criminal that hospitals don’t do that with the rate of infections they have. It’s been proven it works.
Hmmm... That old adage about putting a penny in your shoe for good luck may have had base it fact...