https://www.livescience.com/29377-copper.html
https://www.vice.com/en_us/article/xgqkyw/copper-destroys-viruses-and-bacteria-why-isnt-it-everywhere
https://www.karger.com/Article/Abstract/487667
https://www.telegraph.co.uk/culture/books/3621232/Milkmaids-held-the-key-to-the-cure.html
https://cuverro.com/how-cuverro-works
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3067274/
https://theconversation.com/copper-is-great-at-killing-superbugs-so-why-dont-hospitals-use-it-73103
https://cmr.asm.org/content/32/4/e00125-18
https://www.antibioticresearch.org.uk/about-antibiotic-resistance/bacterial-infections/superbugs/?gclid=Cj0KCQjwsYb0BRCOARIsAHbLPhGrBY82nZCHzNP7e7ZCc-d2WvhTrY0xZRzYRvwKJF9Lw-rY_TEiscEaAn-zEALw_wcB
https://www.statista.com/statistics/459718/total-hospital-admission-number-in-the-us/
https://copperalliance.org/about-copper/long-term-availability/
https://www.copperalloystewardship.com/node/14705
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2779462/