Thimerosal: Let the Science Speak - The Evidence Supporting the Immediate Removal of Mercury - a Known Neurotoxin - from Vaccines is a book authored by Robert F. Kennedy, Jr., which presents a science-based argument for the immediate removal of thimerosal, a mercury-based preservative used in vaccines, from vaccine supplies. The book claims that thimerosal poses a significant threat to public health and has been linked to neurodevelopmental disorders such as autism and ADHD.

Kennedy argues that despite the many voices calling for action, the media and policymakers have repeatedly failed to adequately address the issue of thimerosal in vaccines. He suggests that the science supporting the elimination of thimerosal from the world's vaccine supplies, and its replacement with already available safer alternatives, is all in one place in his book.

The book also dissects the fraudulent population studies ginned up by the CDC to defend thimerosal from its critics.

The book is part of a broader discussion about vaccine safety and the role of thimerosal in vaccines. While the FDA and CDC have stated that there is no evidence of harm caused by the low doses of thimerosal in vaccines, except for minor reactions like redness and swelling at the injection site, Kennedy and his supporters believe that the precautionary principle should be applied, and thimerosal should be removed from vaccines and all other products used in medicine.