Nationwide surveillance of influenza during the pandemic (2009-10) and post-pandemic (2010-11) periods in Taiwan.
Nationwide surveillance of influenza during the pandemic (2009-10) and post-pandemic (2010-11) periods in Taiwan.
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DOI：
10.1371/journal.pone.0036120
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Chiu WT
中科院分区：
文献类型：
--
作者：
Chuang JH;Huang AS;Huang WT;Liu MT;Chou JH;Chang FY;Chiu WT
尽管世卫组织于2010年8月10日宣布世界进入大流行后时期，但2009年甲型H1N1流感病毒继续在全球传播。它的影响预计将在2010-11年流感季节持续。这项研究描述了台湾大流行和大流行后流感大流行期间的全国性监测结果，并评估了2009年甲型H1N1流感在大流行后期间的影响。流感实验室监测网络由12个合同实验室组成，负责收集和检测急性呼吸道感染的样本。对流感样疾病(ILI)的急诊室就诊和门诊就诊的监测分别使用实时爆发和疾病监测系统和国家医疗保险计划数据进行。严重并发症和死亡的住院病例被报告给国家法定传染病监测系统。在2009-2010年流感季节，2009年甲型H1N1大流行是主要的流行毒株，造成44人死亡。然而，2010-11年流感季节开始时，甲型H3N2型流感是主要的流行毒株，2010年12月改为2009年甲型H1N1流感。急诊室和门诊部ILI监测显示出类似的趋势。截至2011年3月31日，有严重并发症的流感病例为1751例；50.1%的病例报告了潜在疾病。在报告的病例中，128例死亡与流感有关。在这些病例中，93例(72.6%)是2009年甲型H1N1流感，30例(23.4%)是甲型H3N1流感。与大流行时期相比，在大流行后紧随其后的时期，观察到住院和死亡人数增加，患者年龄一直较大。2009年甲型H1N1流感在2010-11年流感季节再次出现，活动激烈，年龄分布发生变化。为了进一步减轻未来流感疫情的影响，台湾必须继续其多方面的流感监测系统，保持抗病毒使用政策的灵活性，并修订疫苗政策，将最危险的人群包括在内。
Although WHO declared the world moving into the post-pandemic period on August 10, 2010, influenza A(H1N1) 2009 virus continued to circulate globally. Its impact was expected to continue during the 2010–11 influenza season. This study describes the nationwide surveillance findings of the pandemic and post-pandemic influenza periods in Taiwan and assesses the impact of influenza A(H1N1) 2009 during the post-pandemic period. The Influenza Laboratory Surveillance Network consisted of 12 contract laboratories for collecting and testing samples with acute respiratory tract infections. Surveillance of emergency room visits and outpatient department visits for influenza-like illness (ILI) were conducted using the Real-Time Outbreak and Disease Surveillance system and the National Health Insurance program data, respectively. Hospitalized cases with severe complications and deaths were reported to the National Notifiable Disease Surveillance System. During the 2009–10 influenza season, pandemic A(H1N1) 2009 was the predominant circulating strain and caused 44 deaths. However, the 2010–11 influenza season began with A(H3N2) being the predominant circulating strain, changing to A(H1N1) 2009 in December 2010. Emergency room and outpatient department ILI surveillance displayed similar trends. By March 31, 2011, there were 1,751 cases of influenza with severe complications; 50.1% reported underlying diseases. Of the reported cases, 128 deaths were associated with influenza. Among these, 93 (72.6%) were influenza A(H1N1) 2009 and 30 (23.4%) A(H3N2). Compared to the pandemic period, during the immediate post-pandemic period, increased number of hospitalizations and deaths were observed, and the patients were consistently older. Reemergence of influenza A(H1N1) 2009 during the 2010–11 influenza season had an intense activity with age distribution shift. To further mitigate the impact of future influenza epidemics, Taiwan must continue its multifaceted influenza surveillance systems, remain flexible with antiviral use policies, and revise the vaccine policies to include the population most at risk.
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