2013年3月,上海和安徽出现3例严重的病毒性肺炎,病情快速进展为急性呼吸窘迫综合征(ARDS)及多器官衰竭,并导致死亡。最终确诊这3例均感染了一种新型重组禽流感H7N9病毒(nrH7N9)。截至2013年5月16日,全国已有131例确诊感染了该病毒,其中死亡36例。全病毒基因序列分析显示,nrH7N9是3种禽流感病毒基因重组的产物。目前还 In March 2013, three serious cases of viral pneumonia were reported in Shanghai and Anhui. The disease progressed rapidly to acute respiratory distress syndrome (ARDS) and multiple organ failure, leading to death. In the final diagnosis, all three cases were infected with a novel recombinant avian influenza H7N9 virus (nrH7N9). As of May 16, 2013, 131 cases of this virus have been diagnosed and infected in the country, of which 36 cases were dead. Sequence analysis of the whole virus showed that nrH7N9 was the product of 3 kinds of gene recombination of avian influenza virus. Still