Figure 1A, B.

The changes of HBsAg (A) and HBeAg (B) seroprevalences among groups between 6 and 19 years old and above 20 years old are demonstrated. The positive rate of HBsAg in more recent years was lower than that in the past in both subgroups (*; p<0.001), except for that among subjects above 20 years old in 1999 (; p=0.83), and that among those between 6 and 19 years old in 1998. The positive rates of HBeAg among subjects between 6 and 19 years old were always higher than those among persons above 20 years old since 1996(; p=0.34, § ; p<0.001).