Thanks for posting that Linda! Tons of vaccinations contain mercury, in the form of a preservative called Thimerosal. And that's one of the leadings theories (in the alternative medicine world....regular doctors and pharmaceutical companies all deny it of course) that the mercury in vaccinations leads to autism. Some doctors say it's not that alone, but that in combination with the nasty effects of the MMR vaccination. I know this is a sidebar venting, but as I am mercury toxic, and I work with children with autism, this issue is of great concern to me! Thanks again for posting it.