There is no link to autism and vaccinations. There is no reported evidence, research, reports, or anything else that might link autism to vaccinations. The ingredient that was in vaccinations that was thought to be the offender was taken out of the vaccinations more than ten years ago. This information comes straight from my biopsychology teacher, Dr. Steve Lazarre. As far as the dates of vaccinations go, your doctor will only give your child a shot that will help him, not something that is too late to be effective. If you are worried about health risks, then call your doctor. Ask him what the expected side effects to recieving a second round of vaccinations will be. Your doctor will not do anything to put your child in harms way, and if you feel he will then you need to change doctors. You can also call another doctor for a second opinion. This is what they are there for, to inform you to make the best choices for your child. Besides, if you think about it, do you think that the office would inform you that they might need to be repeated if it wasn't going to work or if it was going to harm your child? If you answer this question yes then you might want to start looking into a different doctor. Hope this helps.