Evaluasi Cakupan Imunisasi Hepatitis B pada Bayi Usia 12 – 24 Bulan di Kabupaten Asahan Propinsi Sumatera Utara
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Indonesia has been categorized as a country with high endemicity of chronic hepatitis B infection, where HbsAg prevalence rate is more than 8%. The incidence of hepatitis B tends to be increase year by year. Hepatitis B immunization plays important role to prevent this infection especially in babies and children under five years. Infection to these groups will cause chronic infection, and in the future may develop as cirrhosis hepatic and liver cancer. People with chronic hepatitis B can spread the infection to the others. Therefore, it is important to conduct an evaluative study to identify the coverage of immunization based on immunization program that has been done. A cross sectional study was conducted in Asahan District, where samples were children aged 12 -24 years taken by cluster sampling technique. The result showed that only 58% children who had complete hepatitis B immunization coverage. The completeness of three doses immunization will give protection over 95% against infection of hepatitis B. The coverage of immunization by serial was relatively high, 65%, 95% and 90% consecutively for HB1, HB2, and HB3. The level of knowledge of mothers about immunization and hepatitis B infection still remain low. To increase the immunization of hepatitis B, health provider and cadre should be more active to promote hepatitis B immunization.