:[目的 ]监测人群流感免疫水平 ,为预防和控制提供依据。 [方法 ]采用微量血清红细胞凝集抑制试验检测。[结果 ]人群中 >1∶ 10的流感抗体滴度分别为 :甲 3亚型 79.3% ,甲 1亚型 5 4.7% ,乙型 B1(B/北京 / 184/ 93) 5 2 .8% ,乙型 B2 (B/北京 / 2 43/ 97) 8.5 %。滴度分布多在 1∶ 80以下。 2 5岁以下组无乙型 B2抗体 ,5岁以下组无乙型 B1抗体。[结论 ]龙岩市区 1999年以前曾流行过甲 3与甲 1亚型流感 ,乙型在近 5年内未见流行 ,应考虑重点保护低年龄组人群 : [Objective] To monitor the level of influenza immunity in population and provide basis for prevention and control. [Method] The micro-hemagglutination inhibition test was used to detect. [Results] The flu antibody titers of 1:10 in the population were 79.3% for type A 3, 4.7% for type A 1, 5.28% for type B (B / Beijing / 184/93) B2 (B / Beijing / 2 43/97) 8.5%. Titers were mostly below 1:80. There was no anti-B B2 antibody in the group under 5 years old and no anti-B1 antibody in the group under 5 years old. [Conclusion] Influenza A 3 and subtype A 1 were prevalent in Longyan urban area before 1999, while subtype B was not prevalent in the past 5 years. Key groups should be considered for the protection of low age group