School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China.
Euro Surveill. 2013 May 9;18(19):20475.
Between 31 March and 21 April 2013, 102 laboratory-confirmed influenza A(H7N9) infections have been reported in six provinces of China. Using survey data on age-specific rates of exposure to live poultry in China, we estimated that risk of serious illness after infection is 5.1 times higher in persons 65 years and older versus younger ages. Our results suggest that many unidentified mild influenza A(H7N9) infections may have occurred, with a lower bound of 210–550 infections to date.
2013 年 3 月 31 日至 4 月 21 日期间，中国六个省份共报告了 102 例实验室确诊的甲型 H7N9 流感感染病例。利用中国针对特定年龄组人群接触活禽情况的调查数据，我们估计，与年轻人相比，65 岁及以上人群感染后的严重疾病风险高 5.1 倍。我们的研究结果表明，可能发生了许多未被识别的轻度甲型 H7N9 流感感染，迄今为止，感染下限为 210-550 例。
