Federal Judge Puts Brakes on RFK Jr's Vaccine Agenda

A federal court ruling handed down on March 16, 2026, drew a legal boundary around decades of science-based immunization policy in the US, halting the most sweeping restructuring of the nation’s vaccine advisory system in its history.¹

US District Judge Brian Murphy of the District of Massachusetts sided with the American Academy of Pediatrics (AAP) and several other medical organizations, ruling that federal health regulators had acted unlawfully in pursuing policy changes championed by HHS Secretary Robert F. Kennedy Jr. The ruling blocked Kennedy’s 13 appointees to the Advisory Committee on Immunization Practices (ACIP) and invalidated votes the reconstituted panel had previously taken, including decisions to downgrade vaccine recommendations for hepatitis B in newborns and for COVID-19 broadly. A meeting of the newly constituted ACIP scheduled to begin on Wednesday was also postponed as a direct result of the injunction.¹

A Panel Dismantled: The Overhaul of ACIP

The ruling came after Kennedy, in a move described as unprecedented, removed all 17 independent scientific experts who had previously served on ACIP in a single day, announcing the decision in a Wall Street Journal opinion article.² Kennedy alleged that the committee had been "plagued with persistent conflicts of interest" and had become a rubber stamp for any vaccine, assertions that were later contradicted by peer-reviewed research finding that reported conflicts of interest among ACIP and FDA vaccine advisory committee members had reached historic lows through 2024, having declined steadily over 25 years.^2,3

Among the individuals Kennedy named to replace the ousted experts were Robert Malone, MD, and Martin Kulldorff, PhD, both of whom had previously expressed skepticism toward vaccines and downplayed the severity of COVID-19.⁴ Other new appointees included individuals with little to no documented experience in vaccine research or immunization policy. Critics noted that one appointee had claimed, without supporting evidence, that COVID-19 vaccines cause miscarriages, and another had undertaken work questioning the safety of the HPV vaccine. In response to the appointments, AAP President Susan J. Kressly, MD, FAAP, said the nation’s leading health care agency had grown "unrecognizable," adding that experts had been sidelined, evidence had been undermined, and the nation’s vaccine infrastructure was now threatened.⁵

Murphy found that of the 15 current ACIP members, only 6 appeared to have any meaningful experience in vaccines, despite the panel’s own charter requiring that its members possess expertise in vaccine use and vaccine research.¹ In his opinion, Murphy wrote that a committee of nonexperts could not be said to embody the fairly balanced points of view within the relevant scientific community required under the Federal Advisory Committee Act. The ruling characterized the schedule overhaul as both a technical procedural failure and an abandonment of the knowledge and expertise that the committee was designed to embody.⁴

The court also found that the CDC had exceeded its authority when, in January 2026, it unilaterally reduced the number of routinely recommended childhood vaccinations from 17 to 11, cutting guidance on diseases including rotavirus, influenza, and hepatitis A, without first consulting ACIP.¹ The reduction followed a directive from President Donald J. Trump instructing Kennedy to align the US vaccination schedule more closely with those of other high-income nations. Murphy held that the CDC lacked authority to make such changes without the committee’s input, finding the agency’s process legally deficient.⁶

The ruling arrived amid a broader legal challenge to Kennedy’s management of vaccine policy. Six leading medical organizations and a pregnant physician had previously filed suit against Kennedy after he announced in May 2025 that the CDC would stop recommending routine COVID-19 vaccines for pregnant women and healthy children, a decision made without a formal ACIP vote and without an acting CDC director in place to review it.⁵ The plaintiffs alleged that Kennedy had eliminated long-standing recommendations without following required legal procedures and had dismissed vaccine experts from ACIP without lawful basis. The AAP separately described the transformation of HHS as deeply troubling and published its own independent vaccine schedule, declaring the ACIP process no longer credible.

At Stake: Vaccine Access for Millions of Children

Among the most significant implications of the ruling was its protection of vaccine access for children enrolled in the Vaccines for Children (VFC) program, a federal initiative through which approximately half of the nation’s children receive immunizations at no cost.¹ Because VFC coverage is directly tied to ACIP recommendations, any downgrading of the schedule carries immediate consequences for whether low-income and uninsured children can access specific vaccines without charge.² Private insurers had separately agreed to maintain vaccine coverage for patients with private insurance; however, children relying on the VFC program had faced the risk of losing access to vaccines that had been removed or downgraded from the recommended schedule.

Public health experts welcomed the decision. Noel T. Brewer, PhD, Gillings Distinguished Professor in Public Health at the University of North Carolina at Chapel Hill, a former ACIP member removed from the panel by Kennedy, told Reuters that ACIP had fallen into such disrepair that many practitioners had begun to ignore its pronouncements, even as those pronouncements retained legal force. He said the ruling put public health back on the right path.¹

Commenting to The American Journal of Managed Care^®, Brewer said, “Insurers agreed to keep covering vaccines for the privately insured. An important impact of the court ruling is ensuring access to vaccines for children covered under the Vaccines for Children program. About half of the nation’s children get their vaccines through VFC.”

Additionally, Richard Hughes, a lawyer for the plaintiffs, called the outcome a victory not only for vaccines and public health in the US, but for science.¹

Administration Vows Appeal as Uncertainty Persists

HHS responded by signaling it would pursue an appeal. An agency spokesperson said the department expected the ruling to be overturned and characterized the decision as an attempt to prevent the administration from governing. Department of Justice attorneys had argued during proceedings that Kennedy held broad statutory authority to reshape vaccine policy and that the changes were intended to address a decline in public trust in vaccines following the COVID-19 pandemic. ACIP appointee Robert Malone, MD, called Murphy a rogue judge, asserting that the administration had strong grounds for appeal.¹

Managed care stakeholders have been following Kennedy’s vaccine actions with concern. ACIP recommendations directly influence which vaccines private insurers are required to cover under the Affordable Care Act, and any downgrading of recommendations can reduce coverage obligations and shift costs to patients and families. Vaccine manufacturers, including producers of mRNA COVID-19 vaccines as well as makers of other childhood immunizations, had grown increasingly cautious about the direction of US vaccine policy under the current administration.^1,2 Earlier changes under Kennedy’s tenure had also included the rescission of federal recommendations for thimerosal-containing flu vaccines, a move that raised concern about access in rural clinics and nursing homes that rely on multidose vials, even as manufacturers moved to replace the affected supply.⁷

The ruling arrives at a moment of mounting disruption across the US immunization system. Pediatricians have reported rising vaccine hesitancy among patients influenced by misinformation, with the AAP noting that vaccine myths and disinformation are being amplified by top leaders at HHS.¹ Nearly a dozen states have begun considering legislation that would relax vaccine requirements for school enrollment. Kennedy has also cancelled CDC and FDA vaccine panel meetings and announced studies revisiting long-discredited links between vaccines and autism.⁴ Bipartisan concern about the direction of vaccine policy is emerging in Congress, with Senate HELP Committee Chairman Bill Cassidy (R, Louisiana), a physician, warning of bias in the newly constituted panel.

Although Murphy declined at this time to block Kennedy’s earlier order instructing the CDC to stop recommending COVID-19 vaccines for healthy children and pregnant individuals, the scope of the ruling could represent a meaningful check on the administration’s vaccine agenda.¹ With an appeal anticipated, the future of the ACIP’s composition, the structure of the US childhood immunization schedule, and vaccine access for millions of children remains unresolved.

References

1. Raymond N, Aboulenein A, Douglas L. US judge blocks efforts to reshape childhood vaccine policy. Reuters. March 16, 2026. Accessed March 17, 2026. https://www.reuters.com/world/us-judge-blocks-efforts-reshape-childhood-vaccine-policy-2026-03-16/

2. Grossi G. RFK Jr sweeps clean CDC vaccine advisory panel, aiming to bolster public confidence. AJMC^®. June 9, 2025. Accessed March 17, 2026. https://www.ajmc.com/view/rfk-jr-sweeps-clean-cdc-vaccine-advisory-panel-aiming-to-bolster-public-confidence

3. McCormick B. Conflicts of interest in federal vaccine advisory committees at historic lows despite RFK Jr claims. AJMC. August 19, 2025. Accessed March 17, 2026. https://www.ajmc.com/view/conflicts-of-interest-in-federal-vaccine-advisory-committees-at-historic-lows-despite-rfk-jr-claims

4. Bonavitacola J. Vaccine skeptics among CDC vaccine panel replacements named by RFK Jr. AJMC. June 12, 2025. Accessed March 17, 2026. https://www.ajmc.com/view/vaccine-skeptics-among-cdc-vaccine-panel-replacements-named-by-rfk-jr

5. Klein H. RFK Jr sued by medical societies over unlawful COVID-19 vaccine rollbacks. AJMC. July 8, 2025. Accessed March 17, 2026. https://www.ajmc.com/view/rfk-jr-sued-by-medical-societies-over-unlawful-covid-19-vaccine-rollbacks

6. McCormick B. CDC reduces US childhood immunization schedule from 17 to 11 diseases. AJMC. January 6, 2026. Accessed March 17, 2026. https://www.ajmc.com/view/cdc-reduces-us-childhood-immunization-schedule-from-17-to-11-diseases

7. Klein H. Federal recommendations for vaccines containing thimerosal rescinded. AJMC. July 24, 2025. Accessed March 17, 2026. https://www.ajmc.com/view/federal-recommendations-for-vaccines-containing-thimerosal-rescinded