Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.
Clin Infect Dis. 2011 Jan 1;52 Suppl 1:S90-3. doi: 10.1093/cid/ciq024.
Following the emergence of 2009 pandemic influenza A(H1N1) virus (pH1N1) in the United States, the incidence of pH1N1 in the community was unclear, because not all persons with influenza come to medical attention. To better estimate the incidence of pH1N1 in the community early in the pandemic, a telephone survey was conducted in 10 states. The community incidence of influenza-like illness in April 2009 was 4.7 per 100 adults (95% confidence interval: 2.8-6.6); half of adults reported seeking medical care for their illness. Such surveys may be important tools for assessing the level of illness in the general population, including those who do not seek medical care and are thus not captured using traditional surveillance methods.
2009 年美国出现甲型 H1N1 流感病毒（pH1N1）后，社区中 pH1N1 的发病率尚不清楚，因为并非所有流感患者都会就医。为了更好地估计大流行早期社区中 pH1N1 的发病率，在 10 个州进行了电话调查。2009 年 4 月，成年人中流感样疾病的社区发病率为每 100 人 4.7 例（95%置信区间：2.8-6.6）；一半的成年人报告因疾病寻求医疗。此类调查可能是评估一般人群疾病程度的重要工具，包括那些不寻求医疗的人群，因此无法使用传统监测方法进行捕捉。
