Factors related to completed status and seropositivity of hepatitis a immunization among children aged 1-3 years and 6-8 years in South Korea.

This study was designed to identify factors associated with hepatitis A immunization status and seropositivity in Korean children. In-person interviews, reviewing their vaccination cards and testing hepatitis A antibody were conducted with 389 children aged 1-3 years and 544 children aged 6-8 years. In all age groups, earlier birth order was the only significant factor in children receiving either single or both doses of the vaccination.

Rubella seroprevalence in Korean children.

The aim of this study was to determine the age-specific rubella seroprevalence and the related factors in Korean children. Subjects of the study were 5393 students from 8 elementary schools in Gyeonggi Province, Korea. Questionnaire surveys with blood sampling were conducted in 1993, 1996, and 1999.