Does thimerosal in flu vaccines cause brain damage?

We know a lot now about thimerosal. Thimerosal, a mercury compound used today in some flu vaccines, has caused concern due to its name being confused with a harmful type of mercury. Thimerosal contains ethylmercury, which is safe and quickly leaves the body. It’s different from harmful methylmercury found in some fish. Thimerosal has been used safely in vaccines, drugs, and contact solutions since the 1930s. Nowadays, most vaccines use single-use vials, and thimerosal-free vaccines are available for those still concerned.

To drum up concerns, vaccine opponents have to travel back in time and make dull government meetings look nefarious. Such is the case with Simpsonwood.

The 2000 Simpsonwood CDC conference was a two-day meeting organized by the CDC to discuss data from the Vaccine Safety Datalink regarding the possible link between the mercury compound thimerosal in vaccines and neurological issues in vaccinated children. Attendees included experts in various fields, public health organizations, and pharmaceutical companies.

The conference gained notoriety in the anti-vaccination movement when RFK Jr. wrote an article in 2005 alleging a conspiracy to withhold vaccine safety information. However, the article contained numerous factual errors, leading to its retraction.

In 2007, the Senate HELP Committee reviewed the allegations against the CDC and found they had mostly no merit. It was found that the CDC did not interfere with vaccine safety studies, and the review groups did not rely on manipulated studies.

Four other allegations were also not substantiated, including claims that the CDC convened the Simpsonwood Conference to cover up findings, pressured Dr. Thomas Verstraeten to change his findings, hid the Vaccine Safety Datalink, or organized public health organizations to hide a link between vaccines and autism. And we know that vaccines do not cause autism.