| age-specific prevalence of hepatitis a antibody in thai children. | age-specific prevalence of anti-hav was determined for 3 groups of children whose mean ages were 12.6, 20.7 and 52.5 months. there were 41, 43 and 99 children in the respective age groups. all children were healthy, from middle to low socioeconomic families in bangkok and vicinity. none of the children in the two younger age groups had anti-hav antibody while 2 of 99 children in the oldest age group did. one of them resided in central bangkok (amphoe dusit) and the other in nonthaburi province. ... | 1995 | 9139381 |