The vaccine preservative thimerosal does not cause autism, the U.S. Court of Federal Claims ruled Friday.
Thimerosal contains mercury, which can affect children’s brain development. But vaccines containing the preservative have tiny amounts of the heavy metal, and many studies have found no evidence that autism is more common among kids who have received vaccines preserved with thimerosal, NPR reported.
From the Associated Press:
Friday’s decision that autism is not caused by thimerosal alone follows a parallel ruling in 2009 that autism is not caused by the combination of vaccines with thimerosal and other vaccines.
The cases had been divided into three theories about a vaccine-autism relationship for the court to consider. The 2009 ruling rejected a theory that thimerosal can cause autism when combined with the measles-mumps-rubella vaccine. After that, a theory that certain vaccines alone cause autism was dropped. Friday’s decision covers the last of the three theories, that thimerosal-containing vaccines alone can cause autism.”
The ruling does not end the debate, however. Families can appeal the federal court decision and sue manufacturers of vaccines.
More information on U.S. Court of Federal Claims autism decisions is available here.

