目的 :了解流行性感冒 (流感 )疫苗的预防效果和安全性。方法 :对接种后的人群进行观察与随访。结果 :流感疫苗对类流感症状的预防有效率在儿童、青年、壮年、老年组中分别为84.0 3%、6 6 .80 %、6 9.87%、和 10 0 .0 0 % ,平均为 76 .5 3%。对预防上呼吸道感染症状的有效率分别为47.6 6 %、5 7.84%、5 2 .87%、和 49.19% ,平均为 48.47%。接种流感疫苗副反应发生率为 0 .94%。结论 :流感疫苗具有良好的预防效果和安全性 Objectives: To understand the prevention and safety of influenza (influenza) vaccine. Methods: The population after vaccination was observed and followed up. Results: The effective rate of influenza vaccine in preventing influenza-like illness was 84.0 3%, 66.80%, 68.87% and 100.0% respectively in children, adolescents and middle-aged adults, with an average of 76%. 5 3%. The effective rates for the prevention of symptoms of upper respiratory tract infections were 47.66%, 7.88%, 5.28%, and 49.19%, respectively, with an average of 48.47%. The incidence of side effects of influenza vaccination was 0.94%. Conclusion: Influenza vaccine has good preventive effect and safety