I wish I had researched vaccines more before I allowed them to be given to my daughter. I had a healthy, happy, vibrant & inquisitive 15 month old daughter - and then I took her in for her "well baby" MMR vaccine and a lot of things changed.
First off, her fever went as high as 103.4, which, the Dr. said that was ok (although I never thought it was). After the shot her whole learning ablity changed. She didn't babble or try to talk as much, and seemed disinterested. I didn't figure it out until she was about5 - that she seemed to become "autistic". Luckily, we had a lot of help with speech & interaction with other children and since, she has seemed to pull out of it.
I still don't view her as "normal" compared to my other children and her peers. But, she can fit in.
After I figured out that she displayed a lot of "autistic" behaviors I started researching and found a lot of links.
That said, I am not 100% against vaccines, but, I think that they are given way too young.