Ask HN: SARS-CoV-2 survives only 4hrs on copper. Why not change handles?

There's a ton of research that copper (and brass and bronze) fittings kill bacteria and viruses. Why aren't hospitals, public buildings, grocery stores, etc all installing copper or brass or bronze surfaces everywhere?

Yes I know it would cost a lot of money, but so is the economy grinding to a halt. That's definitely not free.

https://www.medrxiv.org/content/10.1101/2020.03.09.20033217v2.full.pdf

https://en.wikipedia.org/wiki/Antimicrobial_properties_of_copper

https://www.telegraph.co.uk/news/health/news/9762689/Fit-brass-fixtures-to-cut-superbugs-say-scientists.html