I don't know... I'm a scientist and I think it might be getting to be a little much too.<p>RE 1) We space vaccines out not "just to be safe", but to <i>actually</i> be safe.  You don't want to use a cocktail of things that has been adequately tested.  Also, you space them out so they can be more effective.  Let's say that your body has X immune capacity to absorb the benefit from a vaccine.  You don't want to throw 20 things at it.  About 3 at a time is as much as you want to do.<p>RE 3) Honestly, the only vaccine that I've questioned is the Chicken pox vaccine.  My son got it, but when I was growing up getting the Chicken pox was just part of being a kid.  I understand the rationale: if you don't get it until you're older it's pretty bad, there is the economic cost of a parent needing to be home, etc... but polio it isn't.  (I know, you don't want your kid to be the 1% that has a severe case...  like I said, my kid still got it).