Gumby, do you know where I can find out about what my state "allows"? I live in Oklahoma. So far I know that this state requires a Hep. A vaccine. What the heck does that really mean anyway?! Requires! Are they saving I have no choice? I've been doing a little research on vaccines since I am almost 6 months pregnant with my first child and I don't want to get him vaccinated. Do you know anything about that Japanese study; that they don't vaccinate until 2 years old? Thanks so much!