CDC Study on Vaccine Efficacy Shelved After Internal Review
A significant study demonstrating the effectiveness of the Covid-19 vaccine in reducing hospital admissions has been withheld from publication by the Centers for Disease Control and Prevention. The research, originally scheduled for release in March, revealed that adults who received the coronavirus jab between September and December 2025 were 50 percent less likely to require emergency room care and 55 percent less likely to be hospitalized compared to unvaccinated individuals.
Publication Blocked Despite Scientific Approval
The Washington Post reports that the study was intended for the March 19 edition of the Morbidity and Mortality Weekly Report, the CDC's flagship publication. It had successfully passed the agency's standard scientific review process before being halted by acting CDC director Jay Bhattacharya. Bhattacharya, who is overseeing the agency until President Donald Trump's nominee Dr. Erica Schwartz is confirmed, raised concerns about the methodology used in the research.
A Department of Health and Human Services spokesperson stated that it is routine for CDC leadership to review and flag concerns prior to publication. They explained that Bhattacharya's issues were being addressed to ensure the paper employed the most appropriate methodology. However, sources now indicate the study will not be published at all, leading to allegations of political suppression.
Political Interference Suspected
The decision to shelve the study has sparked fears that it is being suppressed at the behest of Health Secretary Robert F. Kennedy Jr., a prominent vaccine skeptic who has previously labeled the Covid jab as the deadliest vaccine ever made. Kennedy has consistently advocated for greater transparency and choice regarding vaccinations, though he denies being anti-vaccine.
HHS spokesman Andrew Nixon told the Post: "The MMWR's editorial assessment identified concerns regarding the methodological approach to estimating vaccine effectiveness and the manuscript was not accepted for publication." This explanation has been met with skepticism from former CDC officials and public health experts.
Unprecedented Action Raises Eyebrows
Michael Iademarco, who directed the CDC center overseeing the MMWR from 2014 to 2022, expressed surprise at the decision. "I cannot recall CDC stopping an MMWR report in the publication phase after scientific clearance and editorial review," he told the Post. "On rare occasions, we shifted the timing slightly to better align communications plans with competing or reinforcing pieces."
The methodology used in the shelved study has been employed without controversy in previous MMWR publications, including recent reports on flu shot efficacy and Covid vaccine effectiveness in children. Other prestigious medical journals such as The New England Journal of Medicine, JAMA Network Open, The Lancet, and Pediatrics have regularly published vaccine studies using similar approaches.
Broader Administration Vaccine Skepticism
This incident occurs within a broader context of vaccine skepticism within the Trump administration. Last year, Kennedy directed the CDC to drop its Covid vaccine recommendation for children and healthy pregnant women, a move criticized by public health experts. Last month, Kennedy-appointed advisers considered ending recommendations for Covid mRNA vaccines but ultimately shelved the plan.
In a related development, Defense Secretary Pete Hegseth announced on Tuesday that U.S. service members would no longer be required to receive annual flu shots. Hegseth described this as part of a policy to restore freedom and strength to the military, discarding what he called absurd, overreaching mandates that weaken war-fighting capabilities.
The shelving of the vaccine efficacy study raises significant questions about the intersection of public health science and political ideology, particularly as the administration faces midterm elections where vaccine policy could influence voter perception.
