Anna,
  It is always reasonable to make efforts to improve the safety of any vaccine or anything else for that matter. I encourage you to donate funds towards scientific research directed towards this goal.  As for your level of understanding of scientific papers, unless you have earned a higher degree specializing in the field, I question your ability to fully comprehend the complexity involved in these studies and/or their analysis. That's not intended as an insult, it's just the reality of any specialized field. Vaccines do pose a calculated risk but that doesn't mean they are not safe. We make calculated risks every day, driving to work etc.  The risks posed by vaccines are lower than that of the disease. Have you considered the possibility that your granddaughter might have also gotten the disease the vaccine was for and suffered even worse? Who knows! And PS. so you know, doctors sometimes humor patients and parents who insist that vaccines are bad, so you know.