▁This ▁can ▁be ▁especially ▁troubles ome ▁in ▁hospital ▁environments ▁where ▁patients ▁with ▁imm un ode fic ien cies ▁are ▁at ▁en hanced ▁risk ▁for ▁contract ing ▁nos o com ial ▁in fe ctions . ▁ ▁Product s ▁made ▁with ▁ant im icro b ial ▁co pper ▁al loy ▁( br ass es , ▁bron zes , ▁cu pr on ick el , ▁co pper - nick el - z inc , ▁and ▁others ) ▁surfaces ▁destroy ▁a ▁wide ▁range ▁of ▁micro organ isms ▁in ▁a ▁short ▁period ▁of ▁time . ▁The ▁United ▁States ▁Environment al ▁Prote ction ▁Agency ▁has ▁approved ▁the ▁registration ▁of ▁ 3 5 5 ▁different ▁ant im icro b ial ▁co pper ▁allo ys ▁and ▁one ▁synth etic ▁co pper - inf used ▁hard ▁surface ▁that ▁kill ▁E . ▁col i ▁O 1 5 7 : H 7 , ▁m eth ic ill in - res istant ▁St ap hy loc oc cus ▁a ure us ▁( MR SA ), ▁St ap hy loc oc cus , ▁Enter ob acter ▁aer ogen es , ▁and ▁Pseud omon as ▁aer ugin osa ▁in ▁less ▁than ▁ 2 ▁hours ▁of ▁contact . ▁Other ▁investig ations ▁have ▁demonstrated ▁the ▁effic acy ▁of ▁ant im icro b ial ▁co pper ▁allo ys ▁to ▁destroy ▁ ▁Clo str id ium ▁diff icile , ▁influen za ▁A ▁virus , ▁ad en ov irus , ▁and ▁fung i . ▁As ▁a ▁public ▁h yg ien ic ▁measure ▁in ▁addition ▁to ▁regular ▁clean ing , ▁ant im icro