The one that should be a real eye-opener is DTaP. If it was any good at all, would children have to take 6 doses by the time they turn 12 years old? The Pertussis part of the shot specifically is complete trash. It doesn't confer lasting immunity, so they recommend giving it to kids over and over during childhood. Most kids get Pertussis anyway, but the vaccine theoretically prevents them from getting really sick. Theoretically. I'm not aware of any scientific evidence to prove it does though.

In order to get 6 doses of Pertussis vaccine, children are also subjected to 6 doses of Diptheria vaccine and 6 doses of Tetanus vaccine. The Pertussis portion of this trivalent injection is not available as a stand-alone product, so parents are forced to use the trivalent products to conform to the CDC recommended schedule.

My understanding of Tetanus vaccine is that it is supposed to be good for at least 10 years. Taking unneeded doses of a medical product doesn't seem like good science to me. At best it is wasteful, and at worst we're exposing children to unnecessary extra risks.