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目的 观察连续大面积接种流行性乙型脑炎活疫苗的流行病学效果。方法 连续观察１１年接种 乙脑活疫苗的１８２７１５人次的乙脑发病率。结果１１年内均未出现异常反应，总发病率由接种前的２１．８９／１０万下降 到２／１０万左右，保护率为９８．９９％。结论 进一步证明乙脑活疫苗安全有效。
Objective To observe the epidemiological effects of continuous large-area Japanese encephalitis vaccination. Methods The incidence of Japanese encephalitis caused by Japanese encephalitis inoculation of 182,715 were observed continuously for 11 years. Results No abnormal reaction occurred within 11 years. The total incidence dropped from 21.89 / 100000 before inoculation to about 2 / 100,000, the protection rate was 98.99%. Conclusions further prove that JE live vaccine is safe and effective.