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流行性乙型脑炎(简称乙脑)是危害儿童身体健康较严重的一种主要传染病。自1974年在潮阳市推行乙脑疫苗免疫以来,发病率逐年大幅度下降,持续控制在较低水平,流行特征也发生了变化。在施行乙脑疫苗免疫前的1964～1973年的10年中,全市乙脑发病2739例,死亡432例,年发病率波动在9.03/10万～40.82/10万之间。平均年发病率为21.58/10万。年死亡率波动在1.18/10万～7.93/10万之间,平均年死亡率为3.44/10万。流行强度大,波及面广,全市26个区镇均有过不同程度的流行,每年有20～45％自然村有病例发生,1村2例以上较为多见,占总病例数34.2％。发病年龄12
Japanese encephalitis (JE) is a major infectious disease that endangers the health of children. Since the launch of the JE vaccine in Chaoyang City in 1974, the incidence has dropped significantly year by year, continuously under the control of the epidemic, and the epidemiological characteristics have also changed. In the 10 years from 1964 to 1973 before the JE vaccine was administered, there were 2,739 cases of JE in the city with 432 deaths. The annual incidence rate fluctuated between 9.03 / 100,000 and 40.82 / 100,000. The average annual incidence was 21.58 / 100000. The annual mortality rate fluctuated between 1.18 / 100,000 and 7.93 / 100,000 and the average annual mortality rate was 3.44 / 100,000. Popular intensity, spread a wide range of the city’s 26 districts and towns have had varying degrees of prevalence, 20 ~ 45% of villages each year have cases, more than 2 cases of more than 2 cases, accounting for 34.2% of the total number of cases. Age of onset 12