Hepatitis B vaccination coverage of Vietnamese children in south-western Sydney.

Vaccination coverage since the selective hepatitis B vaccination of neonates of high-risk group program introduced in 1987, was measured in 658 children from 301 Vietnamese families living in the south-western Sydney. The vaccination rate of children born after the introduction of the program was twice that of children born before its implementation (OR = 2.00, 95% CI 1.65-2.42). The shorter the mother's duration of residency in Australia, the more likely her children were to be fully vaccinated (OR = 2.49, 95% CI 2.43-2.62). A catch-up vaccination program of older siblings is required to assist the public health strategy to reduce the morbidity and mortality from hepatitis B viral infection.