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The Hands Key Role in Transmitting Nosocomial Infection Bacteria and viruses can persist on hands for up to 4 hours.Hence,hands are the most important transmitters of nosocomial infection Kampf G, Kramer A.Clin Microbiol Rev 2004;17 (4) 863-93.Pathogens can persist on surfaces for months.Hence, contaminated surfaces may serve as transmitter of nosocomial infection after they have been touched and hand disinfection is neglected Kramer A, et al.BMC Inf Dis 2006;6:130.