CDC’s chief blocked a covid vaccine study. Now it’s in a top medical journal. — Live Feedhttps://www.live-feeds.com/feed/cdc-s-chief-blocked-a-covid-vaccine-study-now-it-s-in-a-top-medical-journalContinuously updated, source-cited coverage. Blocked CDC Covid Vaccine Study Published in JAMA Network Openhttps://www.live-feeds.com/feed/cdc-s-chief-blocked-a-covid-vaccine-study-now-it-s-in-a-top-medical-journalhttps://www.live-feeds.com/feed/cdc-s-chief-blocked-a-covid-vaccine-study-now-it-s-in-a-top-medical-journal#u15754Sat, 27 Jun 2026 12:01:20 +0000A study on COVID-19 vaccine effectiveness was published in the peer-reviewed journal JAMA Network Open after being blocked by the CDC chief. The acting director halted the study this spring citing methodological concerns. Findings indicate that vaccines reduce the risk of severe illness and hospitalization, particularly among older adults.What's confirmed:The CDC chief halted a COVID-19 vaccine study this spring over methodological concerns.The study was published Tuesday in the peer-reviewed medical journal JAMA Network Open.Findings suggest COVID-19 vaccines reduce the risk of severe illness