Door handles made out of certain metals dont allow microbiological nasty to exist long , brass door knobs and handles are good in that respect but very long out of fashion nowadays.
A few years ago a buddy of mine got a job installing door handle sanitiser systems in commercial premesis , it was fitted to doors with the lever arm closing mech , a metal bar was installed with a cam so when the door closed a spray bottle vaped ethanol onto the door handle . In my local credit union they installed a dispenser right next to the door handle ,the idea being you sanitise before touching anything inside.
A few years ago a buddy of mine got a job installing door handle sanitiser systems in commercial premesis , it was fitted to doors with the lever arm closing mech , a metal bar was installed with a cam so when the door closed a spray bottle vaped ethanol onto the door handle . In my local credit union they installed a dispenser right next to the door handle ,the idea being you sanitise before touching anything inside.