"Contact killing" is real [1]. A copper ring will definitely kill some bacteria/virus on the skin immediately near where they touch. Related, most copper soluti

"Contact killing" is real [1]. A copper ring will definitely kill some bacteria/virus on the skin immediately near where they touch. Related, most copper solutions are considered hazardous waste. [1] https://pmc.ncbi.nlm.nih.gov/articles/PMC3067274/ https://pmc.ncbi.nlm.nih.gov/articles/PMC3067274/