US Government Knew of Serious Autism Risk From Vaccines This article hyperlinks A newly acquired abstract [acquired via the Freedom of Information Act] from 1999 titled, ‘Increased risk of developmental neurologic impairment after high exposure to Thimerosal containing vaccine in first month of life’ and states: The CDC maintains there is “no relationship between Thimerosal-containing vaccines and autism rates in children,” even though the data from the CDC’s own Vaccine Safety Datalink (VSD) database shows a very high risk.