Is Thimerosal In Vaccines Safe? ACSH Experts Weigh In

By Ana-Marija Dolaskie — Jul 03, 2025
Hear what ACSH's Dr. Josh Bloom, Dr. Chuck Dinerstein and Dr. Henry Miller have to say about the falsehoods of thimerosal claims in regards to vaccine safety, and perhaps the unintended consequences of the panel's latest decision to stop recommending flu shots containing the preservative.

In June, the recently downsized CDC vaccine advisory panel voted to stop recommending flu vaccines containing thimerosal. Health and Human Services Secretary Robert F. Kennedy Jr. posted a lengthy explanation on X, describing Thimerosal as 'toxic' and carcinogenic. The claims get a lot of traction online, despite decades of research on Thimerosal in vaccines. ACSH experts weigh in on the science and perhaps unintended consequences of this move.