Copper and zinc are excellent antibacterial sand antivirals, but they are toxic to our cells as well. The body has highly-evolved means of keeping those out of our inner compartments. So as a topical they’re great, but not internally.
I see why working in a copper or brass foundry would have a protective effect. But the health liability of inhaling those fumes is worse imo.
Something will certainly kill us all one day, but I’d rather it be a cocaine overdose in a brothel than metal fume poisoning.
I’d be indebted if you could find me a study proving the efficacy of cocaine & hookers as an antiviral.