Overview
- The study, published Tuesday, June 23, used CDC‑funded VISION network data from seven states and found the 2025–26 COVID vaccine cut emergency department and urgent care visits by about 50% and hospitalizations by about 55% among adults.
- Authors used a test‑negative design, which compares people who sought care and tested positive for COVID with those who tested negative; proponents and a JAMA editorial said the approach is fast, practical, and its limits can be tested, while critics argue it can be biased by prior infection and care‑seeking differences.
- Acting CDC Director Jay Bhattacharya flagged the paper after it had cleared the agency’s Office of Science for MMWR publication in March, prompting the authors to submit to an external journal and fueling accusations from some public‑health experts that the delay reflected political interference.
- HHS and CDC spokespeople defended their review as ensuring methodological rigor, but independent researchers said peer review in JAMA and the editorial support validate the paper and raised concerns that internal withholding undermines timely public health data sharing.
- The episode raises practical questions for U.S. vaccine surveillance: test‑negative studies provide quick, real‑world estimates useful for near‑real‑time decisions, and narrowing that tool could slow monitoring and reduce timely guidance for clinicians and the public.