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为了解实施人工免疫后的流脑流行特征，对兴化市１９８２年以来的流脑流行病学资料进行回顾性整理发现，流脑流行强度显著降低，发病仍以低年龄为主，≤１岁组发病率达２４．０４／１０万，每隔１０年左右出现不同程度局部流行，使原有的流行规律未有明显变化，Ａ群流脑多糖体菌苗年度季节性接种，使部分儿童因流动等原因未能得到及时免疫而成为免疫空白，是流脑发病的主要原因，可采取多种不同免疫接种形式，实施有效接种，使流脑流行得到进一步控制。
In order to understand the epidemiological characteristics of meningococcal meningitis after artificial immunization, the epidemiological data of epidemic encephalitis in Xinghua City since 1982 were retrospectively reviewed. The prevalence of meningococcal meningitis was significantly lower than that of the controls Group incidence of up to 24.04 / 100000, every 10 years or so appeared in varying degrees of local epidemic, so that the original laws of the epidemic did not change significantly, Group A cerebrospinal fluid cerebrospinal meningitis annual seasonally vaccinated, so that some children It is the main reason for the pathogenesis of meningoencephalic that can not be promptly immunized and can be vaccinated in many different forms. Effective vaccination can be implemented to further control the prevalence of meningococcal meningitis.