A covid vaccine study that the CDC’s chief halted this spring over methodological concerns was published [on June 23, 2026] in JAMA Network Open, a leading peer-reviewed medical journal.
The analysis used the same methodology that CDC’s interim director had criticized when the paper was not allowed to be published in the weekly scientific report of the Centers for Disease Control and Prevention.
The study, which had been slated for publication in March in the CDC’s Morbidity and Mortality Weekly Report, found that the covid-19 vaccine reduced the risk of emergency department visits and hospitalizations among healthy adults by about half last winter. …
“Science was never the issue,” said Michelle Barron, one of the study’s authors and senior medical director of infection prevention and control for UCHealth, a nonprofit health system in Colorado.
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Barron said she believed the study was not published because the findings did not support Health Secretary Robert F. Kennedy Jr.’s agenda that wants to limit the use of covid vaccine specifically.
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Kennedy, the founder of a prominent anti-vaccine group, has been an outspoken critic of covid shots, once referring to them as the “deadliest vaccine ever made.”
