Did the CDC conceal its inner research exhibiting a 1135% enhance in autism danger from the Hepatitis B vaccine? We check out the viral declare, and see what the details actually are.
RFK Jr. Claims CDC Hid Hep B Vaccine-Autism Research
On Monday, 30 June 2025, Robert F. Kennedy Jr. appeared on the Tucker Carlson Present, to speak about autism.
RFK Jr. claimed or urged in that interview (archive) that the CDC lined up an inner CDC research which confirmed an alarming 1135% enhance in autism danger from the Hepatitis B vaccine.
What you’ll do for those who needed to seek out the reply, which is to match outcomes in a completely vaccinated group to well being outcomes in an unvaccinated group. And CDC did that research in 1999.
They introduced in a group of scientists below a Belgian researcher named Thomas Verstraeten they usually regarded on the information. They checked out kids who had acquired the Hepatitis vaccine inside the first 30 days of life, and in contrast these kids to kids who had acquired the vaccine later or under no circumstances.
And so they discovered an 1135% elevated danger of autism among the many vaccinated kids. And it shocked them. They saved the research secret they usually manipulated it by means of 5 iterations to attempt to bury the hyperlink. And we all know how they did it.
They removed all of the older kids basically and simply had youthful kids who’re too younger to be identified, they usually stratified the information and did loads of different tips and all of these research had been the topic of that type of trickery.
Beneficial : Did CDC Bury Hep B Vaccine-Autism Research?
Reality : CDC Did Not Conceal 1135% Vaccine-Autism Danger?
This seems to be one more instance of Robert F. Kennedy Jr. spreading misinformation about vaccines, and listed below are the the reason why…
The CDC research was revealed in 2003
The CDC didn’t cowl up any research that confirmed a 1135% enhance in autism danger from the Hepatitis B vaccine.
The CDC research that RFK Jr. was referring to, was revealed within the journal Pediatrics in November 2003. A duplicate of the research was additionally made accessible on-line (PDF) since April 2016.
Anybody can search for it on-line just by trying to find its title—”Security of Thimerosal-Containing Vaccines: A Two-Phased Research of Computerized Well being Upkeep Group Databases”
It was preliminary evaluation, not a CDC research
Whereas the complete CDC research was peer-reviewed and revealed greater than 21 years in the past, RFK Jr. seems to be referring to an earlier summary of preliminary outcomes that was offered by Thomas Verstraeten and three different colleagues at a 1999 CDC convention for the Epidemic Intelligence Service (EIS).
Research was about thimerosal-containing vaccines
The Verstraeten et al. research was a 2-phased retrospective cohort research to search for a possible hyperlink between thimerosal-containing vaccines, and neurodevelopmental issues.
To be clear—the research was not about Hepatitis B vaccines. It was about thimerosal (also called thiomersal)—an antiseptic and anti-fungal compound used as a preservative in vaccines.
5 vaccines had been lined within the research—the Hepatitis B vaccine, the DTP (Diphtheria, Tetanus, and Pertussis) vaccines, in addition to Haemophilus influenzae kind b (Hib) vaccine.
Even when the research’s information confirmed a security sign (which it didn’t), it will not be attainable for anybody to assert that any explicit vaccine was accountable.
Beneficial : RFK Jr on Fetal Tissue, DNA in MMR Vaccine
Verstraeten et. al. discovered no hyperlink between vaccines and autism
Of their 1999 summary, Verstraeten and his colleagues reported that Section I uncooked information from the Vaccine Security Datalink (now often called Vaccine Security Techniques) seem to point out an elevated danger for non-degenerative neurological issues with thimerosal-containing vaccines.
Nonetheless, that preliminary sign didn’t maintain up after Verstraeten and his colleagues analysed the information in Section 2 of the research.
In 2000, Verstraeten offered Section II evaluation of that information (together with new information from one other HMO) on the Simpsonwood Convention (archive). In his presentation, Verstraeten famous that, with my emphasis in daring:
That is the outcome for autism, by which we don’t see a lot of a development apart from a slight, however not important, enhance for the best publicity. The general check for development is statistically not important.
One other creator of the 1999 Verstraeten et. al. summary additionally identified within the 2000 Simpsonwood presentation that:
Now with autism, if we restrict it to kids with publicity at both one month or three months of age… there’s a relative danger that’s no totally different than one and that’s replicated whether or not we restrict it to kids with a prognosis talked about within the chart the place the kid was referred to a specialist, or the little one was confirmed by a specialist.
In brief, Verstraeten and his colleagues analysed the uncooked information and located that the “sign” proven within the uncooked information was “statistically not important” in spite of everything for autism.
The peer-reviewed Verstraeten et al. research that was revealed concluded that there was “no important associations” between thimerosal-containing vaccines and neurodevelopmental issues. It talked about nothing about Hepatitis B vaccines.
This fake controversy isn’t even new. Emily Willingham wrote extensively about misinformation surrounding the Verstraeten et. al. research in a 2014 Forbes article (archive)—greater than 11 years in the past.
Beneficial : Robert F. Kennedy Jr. known as chemtrails against the law – is he proper?
Verstraeten spoke out towards the false claims
In 2004, Verstraeten spoke out towards claims that the CDC tried to cowl up his findings. In his commentary (behind a paywall) known as “Did the CDC water down the unique outcomes? It didn’t.“, he stated:
The CDC screening research of thimerosal-containing vaccines was perceived at first as a optimistic research that discovered an affiliation between thimerosal and a few neurodevelopmental outcomes.
This was the notion each unbiased scientists and antivaccine lobbyists had on the conclusion of the primary section of the research. It was foreseen from the very begin that any optimistic consequence would result in a second section.
As a result of the findings of the primary section weren’t replicated within the second section, the notion of the research modified from a optimistic to a impartial research. Surprisingly, nevertheless, the research is being interpreted now as unfavourable by many, together with the antivaccine lobbyists.
In different phrases, Verstraeten and his group discovered a possible sign in Section 1 of their research, however couldn’t replicate that discovering after they analysed the information in Section 2.
US Senate investigated the claims in 2007
The US Senate Committee on Well being, Schooling, Labor and Pensions truly launched an investigation into allegations of misconduct surrounding thimerosal-containing vaccines.
In 2007, the Senate committee introduced the findings (PDF) of its 18-month-long investigations, with these conclusions:
Allegation # 2: The Facilities for Illness Management (CDC) convened the Simpsonwood Convention to cowl up the discovering that thimerosal causes autism.
Findings: The allegation isn’t substantiated. … As a substitute of hiding the information or limiting entry to it, CDC distributed it, usually to people who had by no means seen it earlier than, and solicited outdoors opinion concerning interpret it. The transcript of those discussions was made accessible to the general public. The information was additionally mentioned on the Advisory Committee on Immunization Practices, a public discussion board held on June 21 and 22, 2000. Simpsonwood contributors typically agreed that the VSD information set was weak, it was troublesome to evaluate causality, and additional research and investigation had been warranted.
Allegation # 3: Dr. Thomas Verstraeten, MD, MSc, was pressured into altering his analysis place concerning a causal hyperlink between thimerosal and autism.
Findings: The allegation isn’t substantiated. … HELP Committee employees interviewed Dr. Verstraeten with regard to his findings and his participation within the Simpsonwood Convention. …Overview of the phases of Dr. Verstraeten’s research, “Security of Thimerosal-Containing Vaccines: A Two-Phased Research of Computerized Well being Upkeep Group Databases,” and examination of his voluntary response to Committee questions throughout his interview replicate that his intention was all the time to conduct a two-phase research.
On 28 September 2007, the rating member of that Senate committee, Senator Mike Enzi (R-WY) introduced (archive) that the allegations of misconduct was not supported by its investigation.
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