So for starters let me say I am not a 100% anti-vax'er. The number of deaths prevented from the Polio vaccine, for example, have been astounding. However, the fact of the matter is it's all about risk vs benefit and understanding the risks involved is key to making an educated decision about whether that risk is worth it, or not. Having said that, I will never blindly follow simply because some "official" agency tells me something is or isn't safe.