Japanese encephalitis control by Japanese encephalitis vaccine in Expanded Program of Immunization in Vietnam

ABSTRACT

The outcomes of vaccination in 1 to 5-year children were surveyed in high-risk districts between 1997 and 2001. The Japanese encephalitis vaccination schedule as follows In the first years, the children receive 2 injections with 1-week interval, in the next year they receive the third injection. The injection dose is 0.5 ml subcutaneous. Results: For 5 years continuously, there were 1,472,608 one to five-year children had immunized, reached rate of 94.7% in 90 high-risk districts. The program produced dramatic effect on prevention. The incidence of Japanese encephalitis dropped gradually over years. By 2002, the cases reduced by one third in comparison with previous time