A peer-reviewed reanalysis of the Henry Ford Birth Cohort Study, published on 9 December 2025, shows that vaccinated children had significantly higher rates of chronic diseases compared to unvaccinated children.
The reanalysis, authored by John W. Oller, Jr., PhD; Daniel Broudy, PhD and Nicolas Hulscher, MPH, asserts that the original study’s statistical methods obscured large proportional differences in the data.
According to the reanalysis, vaccinated children were sicker across all 22 chronic disease categories listed, with autism-associated neurodevelopmental conditions occurring at 549% higher rates and childhood cancer at 54% higher rates in the vaccinated cohort.
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On 9 September, a Henry Ford study on the impact of childhood vaccination became the centre of vaccination safety debate during a hearing of the US Senate’s Permanent Subcommittee on Investigations titled ‘How the Corruption of Science has Impacted Public Perception and Policies Regarding Vaccines’.
Related: Here’s why the buried Henry Ford study on childhood vaccinations is not flawed as claimed
The study followed 18,468 children between 2000 and 2016 from birth until 31 December 2017 to evaluate the health outcomes of vaccinated compared to unvaccinated children.
The study, referred to as the Lamerato et al study, has never been published in a journal. However, at the Senate hearing, Attorney Aaron Siri, who had received a copy of the study in early 2020, revealed data from the study:
Read more: Henry Ford Birth Cohort Study Vax vs. Unvax Reveals Staggering Health Risks in Vaccinated Children, Children’s Health Defense, 11 September 2025
Siri testified at the Senate hearing, “The study began by explaining it set out to reduce vaccine hesitancy by assuring parents the CDC vaccine schedule is safe. Instead, these researchers found that the vaccinated children have 4.29x the rate of asthma, 3.03x the rate of atopic disease, 5.96x the rate of autoimmune disease and 5.53x the rate of neurodevelopmental disorders, which included 3.28x developmental delay and 4.47x speech disorder. All of these findings were statistically significant.”
“There were also other conditions for which there were numerous cases in the vaccinated group but zero in the unvaccinated group, hence a rate cannot be calculated, including brain dysfunction, ADHD, learning disabilities, intellectual disabilities and tics,” Siri added. “for example, there were 262 cases of ADHD in the vaccinated group and none in the unvaccinated group.”
Related: Aaron Siri’s written submission to ‘How the Corruption of Science has Impacted Public Perception and Policies Regarding Vaccines’, Senate Permanent Subcommittee on Investigations, 5 September 2025
On 9 December, John Oller, Daniel Broudy and Nicolas Hulscher published their reanalysis of the data collected by the Lamerato et al study. The difference between the two studies is the way the data is analysed. The Lamerato et al study used odds-ratio modelling, a statistical approach that masked large disparities. Oller et al used a comparison of proportions per cohort approach. The same data analysed in different ways produced dramatically different results.
The abstract of the Oller et al study said:
Of the 22 chronic disease conditions studied, proportional contrasts always favour the unvaccinated. The most dramatic contrasts occurred in asthma, autism, autoimmunity, ADHD, brain dysfunction, mental health disorders, behavioural disability, developmental delay, learning disability, intellectual disability, speech disorder, motor disability, tics, other disability disorder, neurological disorder, and seizure disorder. At ten years of follow-up, 57% of the vaccinated cohort had at least one chronic disorder, compared with 17% in the unvaccinated.
A Peer-Review of the Vaccinated vs. Unvaccinated Study Discussed at the Senate Hearing on September 9, 2025. (2025). International Journal of Vaccine Theory, Practice, and Research , 4(1), 1609-1646. https://doi.org/10.56098/vse7qq65
The following is Joel Smalley’s summary of Oller et al’s reanalysis. Smalley also posted a short video on Substack to explain the difference between the original study and the reanalysis. We are unable to embed videos uploaded onto Substack. You can watch the video by following THIS link.
Key Results
A peer-reviewed reanalysis of the Henry Ford Birth Cohort Study (18,468 children, 2000-2016) comparing vaccinated (16,511, median 18 vaccines) vs unvaccinated (1,957) children found:
Headline findings:
- All 22 chronic disease categories showed higher rates in vaccinated children
- Autism-associated neurodevelopmental conditions: 549% higher in vaccinated group
- Childhood cancer: 54% higher in vaccinated group
- By age 10: 57% of vaccinated children had developed at least one chronic disease vs only 17% of unvaccinated
Most elevated conditions included:
- Autoimmune disease: 12× higher
- Neurodevelopmental disorders: 13.5× higher
- Speech disorders: 9× higher
- Asthma: 6.5× higher
Several conditions appeared only in vaccinated children: ADHD, diabetes, brain dysfunction, behavioural disability, learning disability, intellectual disability, and tics.
Hulscher argues that the original study’s statistical methods (odds-ratio modelling) masked these disparities, particularly where the unvaccinated group had zero cases.
Read: Peer-Reviewed Reanalysis of the Henry Ford Birth Cohort Study Finds Vaccinated Children Sicker Across All 22 Chronic Disease Categories, Nicolas Hulscher, 11 December 2025
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Categories: Breaking News, US News
Since cancer in normal Childern is and should be(!) about nothing an increase of 54% may be not as significant as the 54% number may suggest, so we should be careful with making conclusions from this number.
The number of autism on the other hand leaves no room for doubts: there’s something wrong there.
Together with the other problems reported, the only logical response can be: stop with these childhood vaccinations, to start with the ones we got the last few decades.