When answering, please back up your statements with scientific papers.

First, who told you that up to 500 children lives were saved? There is no scientific proof of that statement. Neither you nor me have any way of knowing if 500 lives were saved, or 4000, or 0, or even if 500 lives were lost because of the vaccine, that would not have been lost if they had never been vaccinated. There is no scientific study that could prove any of the statements above so anything said in that sense is all speculation and faithful believe, not science.

Second, on the following paper they challenge that seizures provokes brain damage but instead the seizure is result of a brain damage due to another factor: https://www.ncbi.nlm.nih.gov/pubmed/14684233

So if it is the brain damage that causes the seizure, it is the vaccine provoking the brain damage in the first place.

Also in this paper you can find out how seizures cause severe cognitive decline: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1783429/

Finally, if you are still not convinced, here is another scientific paper "Abnormal Brain Connectivity Spectrum Disorders Following Thimerosal Administration"

This paper proves that vaccines provoke Autism spectrum disorder (ASD), tic disorder (TD), and hyperkinetic syndrome of childhood (also known as attention deficit disorder [ADD]/attention deficit hyperactivity disorder [ADHD])
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5433557/

So I insist, vaccines provoked brain damage in all the vaccinated infants and a few of them got seizures. Furthermore we don't know if any life at all was saved afterwards because of the vaccination but we do know that the vaccines created Austim, tic disorder, hyperkinetic syndrome and attention deficit hyperactivity disorder.

These are FACTS from scientific papers, and not the "marketing material" from the pharmaceutical industry that is taught in medical school and that doctors get.