The McCullough Foundation’s Autism Report Isn’t Science — It’s Propaganda

Do not be fooled

This week, the McCullough Foundation published a lengthy document claiming to review “determinants of autism,” concluding that combination and early-timed vaccines are “the most significant modifiable risk factor” for autism. The authors include Peter McCullough and Andrew Wakefield who are two figures whose names are already synonymous with medical misinformation. At first glance, the report mimics the structure of a scientific review: abstracts, tables, hundreds of references. However, beneath the veneer of academic formatting lies something far less credible: a recycled, ideologically driven narrative that has been debunked for more than two decades.

The report’s central claim is that vaccines, particularly those containing aluminum adjuvants or ethyl mercury, cause or contribute to autism spectrum disorder (ASD). It asserts that over 100 studies support this idea and that only a handful find no link. That figure alone should raise eyebrows. The overwhelming body of peer-reviewed evidence from around the world—including meta-analyses covering millions of children—shows no causal relationship between any vaccine or vaccine ingredient and autism. The authors of this new report don’t reconcile that contradiction; instead, they dismiss every null finding as “biased” or “methodologically flawed” and elevate small, often non–peer-reviewed papers or case reports as proof of causation. This is cherry-picking, not science.

What makes the report especially misleading is how it blends legitimate science with distorted interpretation. It correctly notes that autism is multifactorial, shaped by genetics, perinatal conditions, and environmental factors, but then uses that complexity to sneak in a presupposed conclusion: that vaccines are one of those environmental triggers. Correlation is presented as causation. Graphs showing the number of vaccine doses over time are plotted beside autism prevalence curves, suggesting a relationship without any statistical evidence of causality (Figure 2). This is a textbook example of a spurious correlation, the same flawed logic that could “prove” that organic food sales or smartphone ownership cause autism simply because they rose in parallel over the same decades.

Even more troubling is the inclusion of Andrew Wakefield as a co-author. Wakefield’s 1998 Lancet paper, the origin of the modern vaccine-autism myth, was fully retracted after it was revealed that he falsified data, failed to disclose financial conflicts of interest, and violated basic research ethics. His medical license was revoked. To see his name on this “review” disqualifies it from serious consideration. Pair that with Peter McCullough, who has repeatedly spread misinformation about COVID-19 vaccines and lost his board certifications over these issues, and you have a document produced by two of the most notorious figures in the medical disinformation ecosystem.

The authors claim to have “comprehensively examined” the literature but fail to describe any reproducible method for how studies were identified, screened, or evaluated for quality. There’s no mention of pre-registration, bias assessment, or peer review. The inclusion of “gray literature,” conference abstracts, and preprints, sources that bypass scientific scrutiny, further undermines credibility. Meanwhile, high-quality epidemiologic studies from Denmark, Sweden, Japan, and the United States are brushed aside because they don’t fit the narrative. The result is a document that reads more like a legal brief for the anti-vaccine movement than a scientific analysis.

Equally reckless is the report’s conclusion that “combination and early-timed routine childhood vaccination constitutes the most significant modifiable risk factor for ASD.” That is not just false, it’s dangerous. Vaccines prevent deadly diseases such as measles, whooping cough, and meningitis. Suggesting that routine immunization causes autism can directly lead parents to delay or refuse vaccines, which in turn increases outbreaks of preventable illnesses. The ethical responsibility of anyone publishing health information is to ensure accuracy, transparency, and context. This report fails on all three counts.

Autism research has made enormous strides in the past two decades. We now know that genetic variation accounts for the majority of autism risk, with hundreds of implicated genes affecting synaptic development and neuronal signaling. Environmental contributors do exist, but they include factors like advanced parental age, premature birth, and in utero exposure to infections or certain medications. Vaccines are not among them. When anti-vaccine activists ignore this evidence, they not only mislead the public, they divert attention and resources from the real needs of autistic individuals and their families.

Science isn’t about aligning data to fit an ideology. It’s about following the evidence wherever it leads, even when that evidence contradicts our preconceptions. The McCullough Foundation report doesn’t follow the evidence, it manipulates it. It exploits the language and formatting of science to create a façade of legitimacy while undermining the very principles that make science trustworthy. In that sense, it’s not just a flawed paper. It’s part of a broader campaign to erode confidence in vaccines and public health at large, and the cost of that erosion isn’t theoretical, it’s measured in lives.

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