Reanalysis of Henry Ford Birth Cohort Study Finds Vaccinated Children Sicker Across All 22 Chronic Disease Categories
Peer-reviewed reanalysis reports higher rates of chronic illness, cancer, and autism-related disorders among vaccinated children
A newly published, peer-reviewed reanalysis of the largest vaccinated versus unvaccinated childhood birth cohort study ever conducted in the United States has reached conclusions that differ sharply from the original paper’s reassuring claims.
After reexamining the data, researchers found that vaccinated children were sicker across every one of the 22 chronic disease categories studied, with particularly concerning differences in childhood cancer and autism-associated neurodevelopmental disorders.
The reanalysis was conducted by:
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John W. Oller, Jr., PhD — University of New Mexico
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Daniel Broudy, PhD — Okinawa Christian University
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Nicolas Hulscher, MPH — McCullough Foundation
The paper is published in the International Journal of Vaccine Theory, Practice, and Research and is based entirely on the original study’s own data.
A Rare and Powerful Dataset
The original study, conducted within the Henry Ford Health System, followed 18,468 children from birth to age 18 between 2000 and 2016.
Within this population:
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16,511 children were vaccinated, receiving a median of 18 vaccines
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1,957 children were completely unvaccinated, receiving no vaccines
Because all participants were drawn from the same integrated healthcare system, this dataset provides a rare real-world opportunity to compare long-term health outcomes between vaccinated and unvaccinated children without relying on surveys, parental recall, or insurance data.
It is widely considered one of the most comprehensive vaccinated-versus-unvaccinated comparisons ever conducted in the U.S.
Why a Reanalysis Was Needed
Although the original authors concluded that vaccination was not associated with increased long-term health risks, the peer-reviewed reanalysis identified major problems with how those conclusions were reached.
Rather than clearly reporting how many children in each group developed specific conditions, the original study relied heavily on statistical modeling that obscured real-world differences — particularly when certain diagnoses were rare or entirely absent among unvaccinated children.
In practical terms, the health disparities were already visible in the study’s own tables. They simply were not presented in a transparent or easily understandable way.
The reanalysis returned to a straightforward approach: comparing the proportion of children affected in each group, vaccinated versus unvaccinated, across all 22 outcomes listed in the original study.
The Findings: All 22 Chronic Conditions Higher in Vaccinated Children
When the data were examined proportionally, the results were consistent and striking.
Every one of the 22 chronic disease categories occurred at higher rates among vaccinated children.
These included:
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Asthma and allergic disease
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Autoimmune conditions
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Mental health disorders
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Neurodevelopmental and learning disabilities
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Speech and motor disorders
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Neurological and seizure disorders
In many cases, vaccinated children experienced these conditions several times more often than unvaccinated children. Some diagnoses appeared only in the vaccinated group.
Autism-Associated Conditions Were 549% Higher
One of the most concerning findings involved conditions commonly associated with autism spectrum disorder.
Because diagnoses such as autism, ADHD, developmental delay, speech disorders, learning disabilities, and neurological impairments often overlap clinically — and because some were rare or absent among unvaccinated children — the researchers analyzed them together as a unified category of autism-associated neurodevelopmental conditions.
The result was clear:
Vaccinated children had 549% higher odds of developing autism-associated neurodevelopmental disorders compared with children who received no vaccines.
This signal existed in the original dataset but was largely missed due to the analytical methods used in the initial publication.
Childhood Cancer Rates Were Also Higher
The reanalysis also identified a concerning difference in childhood cancer rates.
Based on the original study’s own numbers:
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Vaccinated children had a cancer rate of 1.02%
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Unvaccinated children had a cancer rate of 0.66%
This represents a 54% higher rate of childhood cancer among vaccinated children — a difference that becomes clear when the data are viewed proportionally rather than through complex modeling.
Long-Term Outcome Curve: Vaccinated Children Collapse by Age 10
- Only 43% of vaccinated children remained free of chronic illness by age 10
- 83% of unvaccinated children remained healthyMeaning:
- 57% of vaccinated children developed at least one chronic disease.
- Only 17% of unvaccinated children developed at least one chronic disease.
Why This Matters for Families
Parents are often told that serious long-term risks from childhood vaccines are unsupported by evidence. This peer-reviewed reanalysis challenges that narrative by reexamining existing data with greater transparency.
It raises important questions about informed consent, risk disclosure, and whether families have a complete picture when making medical decisions for their children.
Many of you watched the incredible doc by Del Bigtree, An Inconvenient Study, produced with the Informed Consent Action Network (ICAN), which highlights the Henry Ford birth cohort. Although the study’s results were initially hidden, they are now fully available for scrutiny. This peer-reviewed reanalysis offers the most transparent and accurate look yet at the long-term health outcomes of vaccinated and unvaccinated children.
Sources:
John W. Oller, Jr., PhD; Daniel Broudy, PhD; Nicolas Hulscher, MPH; International Journal of Vaccine Theory, Practice, and Research A Peer-Review of the Vaccinated vs. Unvaccinated Study Discussed at the Senate Hearing on September 9, 2025
Nicolas Hulscher, MPH; Focal Points Courageous Discourse: BREAKING: Peer-Reviewed Reanalysis of the Henry Ford Birth Cohort Study Finds Vaccinated Children Sicker Across All 22 Chronic Disease Categories
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