Copper is antimicrobial, page-13

Entropylord

Copper sulphate mixed with lime has been a traditional method of combating bacterial infections of vines and other agricultural crops, clearly copper is more adaptable than first thought. However considering you have a bee in your bonnet, yes, crops aren't people, we can't spray people. However in the next few years governments are going, with a vengeance, to invest vast sums in public health and don't be too surprised if copper becomes an in demand product for touchable surfaces