What sort of a bad reaction? Only asking because these diseases can be fatal. MMR would be one I would not pass up.
I think this phone app is a good idea. http://www.sciencebasedmedicine.org/...ccine-refusal/
Here's some stories: http://shotbyshot.org/story-gallery/
http://www.vaccinateyourbaby.org/why/victims.cfm
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