Bird Flu Cases Confirmed In China

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Medical workers take part in a drill that simulates human infection... ニュース写真H7N9型・鳥インフルエンザ,ウイルス,人物,医療とヘルスケア,参加者,感染病,横長,武漢,病気,職業,鳥インフルエンザウィルスPhotographer Collection: ChinaFotoPress 2013 ChinaFotoPressWUHAN, CHINA - APRIL 08: (CHINA OUT) Medical workers take part in a drill that simulates human infection of the H7N9 bird flu virus on April 8, 2013 in Wuhan, China. China is increasing efforts to stem a confirmed H7N9 bird flu outbreak which has infected at least 21 people and killed six. Many poultry wholesale markets have been closed in central and eastern China. (Photo by ChinaFotoPress via Getty Images)