My mom is a vaccination pro. She does think that certain issues (autism included) can potentially be caused by the artificial preservatives and stuff in them. I most likely have Asperger's and my oldest first cousin has severe autism. His brother also had a seizure from a vaccination side effect. She did ban all vaccinations from entering anyone in my family for several years, but we get stuff like meningococcal, influenza, Tdap/Dtap, Hepatitis, etc now. Her problem now is giving vaccinations in heavy amounts to babies. Their immune systems simply shouldn't have to handle all that.