MMWR Morb Mortal Wkly Rep. 2002 Apr 5;51(13):276-9.
Although data collected from the four components of the CDC influenza surveillance system are preliminary, national influenza activity appears to have peaked during the week ending February 23, 2002 (week 8). During the 2000-01 and 1999-2000 influenza seasons, peak activity occurred during week 4 and week 51, respectively. The viruses most commonly isolated during the 2001-02 season have been influenza A (H3N2). These viruses were well-matched antigenically by the 2001-02 influenza A (H3N2) strain in the vaccine. This report summarizes influenza activity in the United Statest during September 30, 2001-March 23, 2002, and updates previous summaries from this season.
尽管从美国疾病控制与预防中心（CDC）流感监测系统的四个组成部分收集的数据是初步的，但全国流感活动似乎在2002年2月23日结束的那一周（第8周）达到了高峰。在2000 - 2001年和1999 - 2000年流感季节，高峰活动分别出现在第4周和第51周。2001 - 2002年季节最常分离出的病毒是甲型（H3N2）流感病毒。这些病毒在抗原性上与2001 - 2002年流感疫苗中的甲型（H3N2）毒株匹配良好。本报告总结了2001年9月30日至2002年3月23日期间美国的流感活动，并更新了本季节之前的总结。
