

https://www.theguardian.com/us-news/2025/sep/10/vaccine-hearing-congress-illness-children
Some quotations.
Zervos and the other authors of the study were not present at the hearing. The study, which has never been peer-reviewed, is not currently available to the public as a pre-print or in any other form.
Jake Scott, a clinical associate professor of infectious diseases at Stanford – and the only physician who served as a witness during the hearing – had a different explanation as to why the study was not published.
In his testimony, Scott said that the study is “fundamentally flawed”, adding that its core problem was that “vaccinated children had twice the follow up time and substantially more healthcare visits than unvaccinated children”. More healthcare visits mean more opportunities to be diagnosed with conditions like ADHD.
Scott went on to explain that “the study reports zero ADHD cases among 1,000s of unvaccinated children. How is that possible with a national prevalence at 11%? That’s highly unlikely, unless conditions went undiagnosed.” Scott noted that the study also claimed a six to eightfold increase in ear infections among vaccinated children, but there is no plausible scientific explanation as to why vaccines would increase ear infections.
This finding is consistent with past research showing that parents who do not vaccinate their children are also less likely to have their children treated for health conditions in the medical system. Conditions that were not diagnosed or treated would not have shown up in the study, which relied on medical records, according to hearing testimony.