Delaying childhood vaccinations, or not getting immunized at all, does not provide any neuropsychological benefits for children at 7 to 10 years of age and might even result in poorer outcomes on some measures.

Data from a cohort study by Thompson and colleagues in the September 27, 2007, issue of the New England Journal of Medicine  to assess whether children who receive recommended vaccines in the first year of life vs those who have delayed or incomplete vaccination had different neuropsychological test results at ages 7 to 10 years.

Also, noteworthy was that children with the greatest verses the least vaccine exposure in the first 7 months of life seem to have no adverse neuropsychological outcomes at ages 7 to 10 years of age.

"Delaying or Forgoing Childhood Vaccines Offers No Neuropsychological Benefit Down the Road." Medscape CME Clinical Briefs