I really appreciate your article. I wish I had more time today to reply. Japan is one of the best examples when it comes to vaccine studies. One extra addition to the Hep shot. The effective lifespan of the shot is 8 years. So a boost is needed. It is pointless to provide this to young children unless they live where they can be raped or near intrevenous drug use. They should be given a chance for their little bodies immune systems to grow before they get this shot.