Japanese B Encephalitis － Taiwan Area
Taiwan Provincial Institute
1985 Vol.1 NO.12
Although significant progress is made in controlling Japanese B encephalitis (JE) in Taiwan in the late 1960’s, the incidence of the disease has changed little in the past 10 years (Figure I). In l984, the most recent year for which surveillance data are available, there were 239 total JE cases (179 suspect and 60 serologically confirmed) and 20 deaths for a case fatality rate of 8.4%. The case fatality rate during the last decade has fluctuated between 8.4% and 20%. The majority or .IE cases occur in children 10 years of age, however, the median age of cases has gradually increased from 6 to 10 years during the period 1975 to 1984. Presently, JE accounts for nearly 1% of all deaths in Taiwan in the 5-9 year age group.