MMWR Morb Mortal Wkly Rep. 2004 Apr 9;53(13):284-7.
This report summarizes influenza activity in the United States during September 29, 2003-March 27, 2004, and updates the previous summary. This report also summarizes human infections with avian influenza viruses related to poultry outbreaks in North America. Preliminary data collected through CDC influenza surveillance indicate that national influenza activity peaked during late November-December. The most frequently isolated viruses were influenza A (H3N2), and approximately 87% of these were similar to the drift variant A/Fujian/411/2002.
本报告总结了2003年9月29日至2004年3月27日美国的流感活动情况，并更新了之前的总结。本报告还总结了北美与家禽疫情相关的人感染禽流感病毒情况。通过美国疾病控制与预防中心（CDC）流感监测收集的初步数据表明，全国流感活动在11月下旬至12月达到高峰。最常分离出的病毒是甲型流感（H3N2），其中约87%与漂移变异株A/福建/411/2002相似。
