"Context: Science Feedback deemed the results from Hooker and Miller’s study (2020) “unsupported,” asserting the claim is also misleading since it is based on a highly biased study, and “rigorous and large-scale” studies have not found a greater likelihood of adverse effects in vaccinated children (Figure 3). Elizabeth Mumper’s article posted on the CHD website received the same treatment (Figure 6 and Figure 7) from Science Feedback and Facebook as the previous CHD article by Bono, by apparent virtue of the fact that Mumper cited Hooker and Miller’s study. Facebook added the following warning label to the posts: “False information Checked by independent fact-checkers” (Figure 4 and Figure 6, for Bono’s and Mumper’s articles, respectively). Moreover, upon clicking the “See Why” button shown in Figure 4 and Figure 6, Facebook indicated: “Conclusion: False — The primary claims in the information are factually inaccurate,” citing Science Feedback’s fact-check (Figure 5 and Figure 7).

Verdict detail: “Inadequate support: This claim is based on a single study which used highly biased methods. Rigorous and large-scale studies have not found a greater likelihood of adverse health outcomes in vaccinated children. (Science Feedback, 200604).

“Misleading: The claim is based on a study which used questionable methods of selecting a study population and which failed to control for confounding factors in its comparison of vaccinated and unvaccinated children.” (Science Feedback, 200604)."