A federal judge in Boston has temporarily blocked key elements of Health Secretary Robert F. Kennedy Jr.’s effort to overhaul U.S. vaccine policy, stating that the administration likely acted unlawfully. In a preliminary ruling, Judge Brian E. Murphy determined that the restructuring of a major vaccine advisory committee, along with revisions to the childhood immunization schedule introduced in January, were probably illegal. The court found that these actions likely violated the Administrative Procedure Act, which sets the standards federal agencies must follow when developing and implementing policy changes.
The ruling, while not final, represents a significant setback for the Trump administration’s efforts to reshape national vaccine policy, even as broader reforms continue. The court’s final decision, as well as the administration’s response, may have significant implications for public health in the United States. A planned meeting of the Advisory Committee on Immunization Practices has been postponed following the court order. Judge Brian E. Murphy noted that vaccination decisions have traditionally followed a structured, science-based process grounded in legal standards.
He criticized the government for failing to follow these procedures, stating that this undermined the validity of its actions. He also pointed out that the administration bypassed the established role of the Advisory Committee on Immunization Practices in revising immunization schedules, describing this not only as a procedural failure but also as a disregard for critical scientific input.
According to Richard Hughes IV, a partner at Epstein Becker & Green who represented the plaintiffs, including the American Academy of Pediatrics, the ruling marked a major victory for science, public health, and the rule of law. According to him, the plaintiffs prevailed on all significant arguments in the case. The federal government is expected to appeal the decision. Responding to the ruling, Andrew Nixon, a representative of the U.S. Department of Health and Human Services, said the administration anticipates the decision will be overturned and criticized earlier court actions that limited its policy agenda.
Currently, the Advisory Committee on Immunization Practices includes several members whose views align with the vaccine scepticism expressed by Robert F. Kennedy Jr. In June, Robert F. Kennedy Jr. dismissed all previous committee members, stating that the move would help restore public confidence in vaccination policies. Among those removed was Noel Brewer, a professor at the University of North Carolina, who had been an advocate for the court ruling. Brewer described the decision as long overdue and criticized the current direction of the committee, stating that it has done a disservice not only to the United States but also to other countries that rely on U.S. vaccination guidance.
The judge reviewed the qualifications of the newly appointed committee members and discovered no clear evidence that they possessed the relevant expertise in vaccines necessary to make decisions on federal policy. Although the court was open to being persuaded, it noted that the defendants failed to provide a sufficient basis to evaluate the member’s qualifications.
Judge Murphy further criticized the administration for restructuring the committee without following due process, noting that previous appointments typically took years and involved extensive consultation. He also raised concerns about whether the panel possessed the necessary expertise, particularly given the potential difficulty in identifying highly qualified individuals who align with the administration’s views on vaccination. A legal expert described the committee as more of a public relations effort than a genuine attempt to obtain scientifically qualified expertise. The ruling also raised concerns about the panel’s future credibility, noting that it is already being disregarded by a significant number of states.
Although the committee had scheduled its first meeting, the court barred it from taking any votes in its current form. The government, through the Justice Department, argued that major public health actions such as promoting measles exposure should not be subject to judicial review, but the judge firmly rejected that position.
Nevertheless, the ruling does not affect all vaccine-related actions, including federal research funding and approvals by the Food and Drug Administration. It comes at a time when the White House may be reassessing its aggressive vaccine policy changes, partly due to political considerations in an election year.
Legal experts also noted that an appeal to the Supreme Court of the United States may be challenging, particularly because the administration has framed the changes as non-binding recommendations. However, several officials do not view the ruling as a final setback and expect the administration to proceed with an appeal.
Reference: STAT. Federal judge stalls health secretary RFK Jr.’s overhaul of vaccine policy. Published March 16, 2026. Accessed March 17, 2026. Federal judge stalls health secretary RFK Jr.’s overhaul of vaccine policy
