Boston federal judge scrutinizes RFK Jr. vaccine-policy overhaul as medical groups seek immediate court intervention

A fast-moving legal fight over federal vaccine policy is unfolding in Boston

A federal courtroom in Boston has become the central venue for a widening challenge to vaccine-policy decisions made under Health and Human Services Secretary Robert F. Kennedy Jr., with medical and public health organizations asking a judge to halt or unwind several actions they say were taken outside required federal processes.

The litigation, filed in U.S. District Court in Massachusetts, initially focused on a directive issued in May 2025 that removed COVID-19 vaccination recommendations for healthy children and pregnant people from federal guidance. Plaintiffs include major physician and public health groups and an unnamed pregnant physician, and the suit seeks court-ordered restoration of prior recommendations.

What plaintiffs are asking the court to do

The case has expanded beyond the May 2025 directive. By early 2026, the challenge encompassed additional disputes over changes affecting the federal infrastructure used to evaluate and recommend vaccines, including the composition and role of the Advisory Committee on Immunization Practices, the panel that advises the Centers for Disease Control and Prevention on immunization policy.

In February 2026, the presiding judge, Brian E. Murphy, held arguments as the plaintiffs pressed for urgent relief on a compressed timeline, citing upcoming federal advisory activity and the practical effects that guidance changes can have on clinical practice, public messaging, and access pathways that often track federal recommendations.

• The lawsuit targets the legality of shifting recommendations without the customary evidentiary review and advisory processes.
• It also contests broader structural changes to how vaccine guidance is developed and adopted at the federal level.
• Plaintiffs have sought injunctive relief designed to pause implementation while the court considers the merits.

The judge at the center: Brian E. Murphy

Murphy is also known for rulings that have constrained the Trump administration on immigration policy. In separate proceedings, he issued orders limiting removals to “third countries” without notice and a meaningful opportunity for individuals to raise fears of persecution or torture—decisions that were viewed as significant judicial setbacks for the administration’s deportation strategy.

That background has drawn heightened attention to Murphy’s handling of the vaccine case, which similarly turns on questions of process, statutory authority, and the extent of executive-branch discretion under federal administrative law.

Policy ripple effects beyond the courtroom

The dispute is playing out amid diverging state and federal approaches to vaccine access. In Massachusetts, state officials moved in 2025 to require health insurers to cover vaccines recommended by the state’s public health leadership even if federal recommendations narrow, an approach designed to reduce disruptions for residents seeking immunizations.

At stake is whether major federal vaccine guidance can be narrowed or restructured without the conventional pathways that historically shape national immunization policy.

What comes next

Murphy has not issued a final, comprehensive ruling resolving the full scope of the case. The court’s next steps are expected to address whether immediate restraints are warranted while the underlying legal claims—focused on procedure, authority, and administrative requirements—are litigated to conclusion.