I've seen 24 hours on cardboard[1] The best appears to be copper, which is 4 hours[1] which is why I bought some copper tape online and wrapped shared touch su

I've seen 24 hours on cardboard[1] The best appears to be copper, which is 4 hours[1] which is why I bought some copper tape online and wrapped shared touch surfaces in my apartment with it (though be careful to avoid getting cuts when you grip it). 1. https://www.npr.org/sections/health-shots/2020/03/14/811609026/the-new-coronavirus-can-live-on-surfaces-for-2-3-days-heres-how-to-clean-them https://www.npr.org/sections/health-shots/2020/03/14/8116090...