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美国及世界流感活动性及１９９３～１９９４年流感疫苗的组成ＷＨＯ国际合作实验室、美国洲和地方公共卫生组织和美国疾病控制及预防中心协作对流感活动性及病毒在流行周期中的抗原变异进行监测。美国：１９９２～９３年流感季节，美国流感活动始于１０月份，１２月～次年...
US and World Influenza Activity and Composition of Influenza Vaccine from 1993 to 1994 The WHO International Cooperation Laboratory, the U.S. and Regional Public Health Organizations and the US Centers for Disease Control and Prevention collaborate on influenza activity and antigenic variation during the epidemic cycle of the virus monitor. United States: Influenza seasons from 1992 to 1993, the United States flu activity began in October, December ~ next year ...