Expert discusses three key points about thimerosal safety and its controversial nature. Image credit: Luis Velasco/Stocksy. The US government may prohibit vaccines containing thimerosal, a preservative shrouded in safety concerns. While largely omitted by vaccine manufacturers, some flu shots still contain thimerosal, prompting inquiries into the potential impact of a ban on vaccine availability. A CDC advisory committee recently opposed thimerosal use in vaccines, labeling it a neurotoxin and advocating for its removal to improve public health. Thimerosal serves as a preservative to maintain vaccine efficacy, but its controversial reputation stems from its mercury content, perceived health risks, and historical ties to autism concerns. Despite containing ethylmercury – a form deemed safe by the WHO – thimerosal’s misassociation with autism has been debunked by research. The disputed link to autism was based on a discredited study that has since been retracted, prompting clarification from experts regarding thimerosal’s safety profile.
Dr. Katherine L. O’Brien emphasizes the lack of evidence showing harm from thimerosal use. Despite its safety, thimerosal is rarely used in U.S. vaccines as a precaution. While most childhood vaccines removed thimerosal in 1999, it remains in some flu shots due to its preservative properties. Dr. Monica Gandhi highlights concerns that banning thimerosal could impact vaccine availability, potentially leading to decreased flu vaccine production and limited access for children. This could pose serious risks during flu season, as flu cases are already on the rise. The CDC warns of the flu’s severe complications in young children.
