I am AB+, (1.2% of the population has this blood type), and am an Aspie. My youngest son, whom is 6, was diagnosed with ASD, (Asperger's), just a year ago. He was also 2 months premature, but I know this has nothing to do with his ASD, or vaccinations. He was showing signs of patterning, etc.. at just a few days of age, vocally and by tapping his fingers and facination with light switches. His blood type is also A.
It would be interesting to find out if blood type, is related to ASD.