In The Politics of Autism, I analyze the myth that vaccines cause autism. This bogus idea can hurt people by allowing diseases to spread. Examples include measles, COVID, flu, and polio.
A key vaccine policy advisory group is recommending that the public not receive vaccines that have thimerosal, a mercury-containing preservative that’s used to prevent germs, fungus and bacteria from building up in vials.
While thimerosal isn’t common, the debate over its use at the federal public health level is seen as emblematic of the concerns of health experts, who fear that policies under Health and Human Services Secretary Robert F. Kennedy Jr. will chip away at evidence-based science.
The Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices, comprised of entirely new members appointed by Kennedy, voted Thursday to make the recommendation. The topic appearing on the meeting agenda at all came as a surprise to many in public health and clinician communities. The CDC itself says it’s been long established that there is no evidence that the amount of thimerosal included in some flu vaccines is harmful.
Thimerosal is used in multidose flu vaccine vials to prevent contamination when the second dose is pulled, according to the Food and Drug Administration. The amount of mercury in vials is about equal to the amount of mercury contained in a three-ounce can of tuna, the FDA says.
Vaccine skeptics have promoted the idea that it’s linked to autism and ADHD. Kennedy was editor of a 2014 book titled “Thimerosal: Let the Science Speak,” which called for the removal of the substance from vaccines.
Critics say that in resurrecting an old controversy, Mr. Kennedy could brew mistrust rather than ease it. Numerous studies, including a 2004 report by the Institute of Medicine and a 2010 review of the medical literature, have rejected a link between the preservative and autism. Dr. Oz, who now runs the Centers for Medicare and Medicaid Services, noted on his 2014 show that any link had been “ultimately discredited.”
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Dr. Paul Offit, a vaccine expert at Children’s Hospital of Philadelphia who served on the advisory committee from 1998 to 2003, remembers Ms. Redwood protesting the C.D.C. at that time, when health experts were originally debating thimerosal’s risks. He objected to an advocate making a scientific presentation to the advisory committee.
“It wasn’t clear to me that she was saying autism anymore, like she did 25 years ago,” he said of her presentation Thursday, adding, “It’s like Whac-a-Mole. They just keep moving onto the next thing.”
Ordinarily, such a presentation would be preceded by an analysis from C.D.C. experts. But the panel on Thursday did not hear from the C.D.C. The agency posted a document on the advisory committee’s website on Tuesday that concluded “the evidence does not support an association” between the preservative and autism or other neurodevelopmental disorders.
But the document was taken down the next day. A spokesman for Mr. Kennedy, Andrew Nixon, said that it had not gone through the proper vetting, but that committee members had been given copies of the document.
