The association between the presence of thimerosal in vaccines and autism is
Debatable
http://www.google.com/#q=thimerosal+in+vaccines+and+autism
controversial and has been extensively studied. Thimerosal is a preservative that contains mercury and was commonly used in vaccines until the early 2000s. Some individuals have raised concerns that thimerosal might be linked to the development of autism spectrum disorder (ASD).
To investigate this association, numerous studies have been conducted. These studies involve comparing rates of ASD among vaccinated and unvaccinated individuals, as well as examining different populations and time periods. The vast majority of these studies have found no evidence of a causal link between thimerosal-containing vaccines and autism.
To get information about the scientific consensus on this topic, it is essential to consult reliable sources such as scientific journals, reputable health organizations, and regulatory agencies. These sources often provide comprehensive reviews of the research done on this issue. Examples include the Centers for Disease Control and Prevention (CDC), the World Health Organization (WHO), and the Institute of Medicine (IOM).
It's important to note that thimerosal has been removed or reduced to trace amounts in almost all childhood vaccines since the early 2000s, except for some multi-dose vials of the influenza vaccine. This change was primarily made as a precautionary measure to address public concerns rather than due to any conclusive scientific evidence of harm.
In conclusion, while the association between thimerosal and autism has been extensively studied, the consensus among scientific experts is that there is no credible evidence to support a causal link between thimerosal-containing vaccines and autism.