Objective To analyze the possible source of infection under the condition of no exposure to sick or dead poultry and provide scientific evidence for further prevention and control of avian influenza.Methods Epidemiological and serological assays,emergency surveillance,ELISA,Real-time PCR,RT-PCR were used for the analysis and diagnosis of human cases infected with H5N1 avian influenza virus.Results The two human cases who had been usually visited farm product market infected with H5N1 were found.History of e...

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