MMWR Morb Mortal Wkly Rep. 1997 Dec 19;46(50):1192-4.
In collaboration with the World Health Organization (WHO), its collaborating laboratories, and state and local health departments, CDC conducts surveillance to monitor influenza activity and to detect antigenic changes in the circulating strains of influenza viruses. This report summarizes influenza surveillance in the United States from September 1 through December 12, 1997, which indicates that influenza activity is at typical levels for this time of year and that influenza A(H3N2) viruses have been most commonly isolated.
美国疾病控制与预防中心与世界卫生组织（WHO）、其合作实验室以及州和地方卫生部门合作，开展监测以监控流感活动，并检测流感病毒流行毒株的抗原变化。本报告总结了1997年9月1日至12月12日美国的流感监测情况，该监测表明本年度此时的流感活动处于典型水平，且甲型（H3N2）流感病毒是最常分离出的毒株。
