Rates of autism have increased in California despite the removal of the preservative thimerosal from childhood vaccines seven years ago, a finding that researchers say disproves the theory that the mercury in thimerosal causes the mysterious neurological disorder.
The study, which analyzed autism rates in young children over a 12-year period, is the first to offer hard evidence that thimerosal plays no role in autism. Results of the study were released Monday in the Archives of General Psychiatry, a publication of the Journal of the American Medical Association.
“Whatever the explanation for this increase in children with autism, exposure to mercury in vaccines is not it,” said Robert Schechter, a medical officer with the California Department of Health Services and lead author of the study. “Vaccines with thimerosal and without have been safe and appropriate to give to our children.”
