Background: Japanese Encephalitis (JE) is common in the plains and mountainous areas in
Asia \u2013 Pacific.
Japanese encephalitis vaccine shows
effectiveness in protecting
children from JE in some countries such as
Japan and
Korea .
Objective: To evaluate the
efficacy of
Japanese Encephalitis (JE)
vaccination in
Thai Binh province during 2003-2007. Subject and
Method: Prospective, retrospective and sero-
epidemiological methods were carried out on 329 samples collected from
viral encephalitis patients and tested by JE MAC-
ELISA , the positive average was 41.6% (137/329).
Result: It had dramatically dropped from 85.2% in 2003 to 8.5 % in 2007 related to the rate of JE
vaccination for
children from 1 to 5 years old increasing from 49 % in 2003 to 77 % in 2007. Most of JE confirmed cases were
un -vaccinated.
Conclusion: JE
etiology cause
viral encephalitis in
children in
Thai Binh province was reduced thanks to JE
vaccination in EPI program for 1 to 5 year old
children . But more than 96% (131/136) of
viral encephalitis in 15 years old upward was unknown
etiology , the need for further study of the
etiology cause
viral encephalitis in
adults .