MD REPORTS

MD REPORTS

Bhattacharya accused of blocking CDC study — but flawed methods escape scrutiny

A row over a “blocked” CDC study has centred on censorship rather than the study’s flawed methods or the journal it was headed for.

Maryanne Demasi, PhD's avatar
Maryanne Demasi, PhD
Apr 30, 2026
∙ Paid

Jay Bhattacharya has faced a wave of criticism after reports he stopped publication of a CDC study said to show the “benefits” of COVID vaccination while overseeing the agency.

The paper had been slated for the CDC’s in-house journal, Morbidity and Mortality Weekly Report (MMWR).

The reaction from public health figures and legacy media was immediate and largely one-sided, focusing on suppression rather than the evidence itself.

Now the study has been released.

Published exclusively on Inside Medicine, it reports a 50–55% reduction in COVID-related urgent care visits and hospitalisations — a figure already being used to reinforce claims about vaccine effectiveness.

But the central question has been largely sidestepped — is the study itself reliable?

Critics have not been deterred by the weak study design. If anything, they have doubled down and defended it.

What actually happened

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