Inactivation of Influenza A Virus on Copper Versus Stainless Steel Surfaces

Noyce JO, Michels H, Keevil CW. Appl Environ Microbiol. 2007 Apr;73(8):2748-2750.

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Influenza A virus particles (2 x 106) were inoculated onto copper or stainless steel and incubated at 22°C at 50 to 60% relative humidity. Infectivity of survivors was determined by utilizing a defined monolayer with fluorescent microscopy analysis. After incubation for 24 h on stainless steel, 500,000 virus particles were still infectious. After incubation for 6 h on copper, only 500 particles were active.