Another drawback is the potential for some kids to have undiagnosed autism before getting the MMR vaccine, which could make the MMR vaccine appear linked to autism when it really isn't connected, the study authors note.
Classic autism typically manifests itself around the age of two or so. Those children often hit the usual milestones exactly on target, and then regress. It's heartbreaking.
But often the autism is there from the beginning, although the parents may not have recognized it.
My older son has Asperger's, and for the longest time we thought he was just quirky and unique, the way most parents view their kids. Then someone said she thought he might possibly have Asperger's, and I ought to check it out. When I went on line it was as if they'd studied my son before writing up the definition. He'd always had it, we just didn't have a word for what he was like.
However, I do want to point out that a 7% difference between the two groups is pretty small, if measurable.