A fact-checking website, Health Feedback, found that a study comparing vaccinated and unvaccinated children used unvalidated metrics and introduced its authors' biases into its conclusion. The authors did not account for the differences in background and behaviors between vaccinated and unvaccinated children. The study, published in the International Journal of Environmental Research and Public Health, sought to support a claim that unvaccinated children are healthier than vaccinated children.
Oregon has suspended the medical license of one of the study's authors for “gross and repeated negligence” after he created an alternative vaccine schedule for his patients that omitted and reduced the frequency of vaccines.
U.S. health authorities consider vaccines to be safe and effective, and recommend all children receive vaccinations in consultation of medical professionals.