Federal Judge Issues Preliminary Injunction Against HHS
A federal court has dealt a major blow to HHS Secretary Robert F. Kennedy Jr. On Monday, US District Judge Brian E. Murphy in Boston issued a preliminary injunction. It blocked several sweeping changes Kennedy made to the national childhood immunization schedule. The ruling marks a pivotal moment in US public health policy.
What Changes Did the Court Block?
The injunction stays the heavily revised vaccine schedule issued by HHS on January 5. It also overturns the May 2025 Secretarial Directive on COVID-19 vaccine recommendations. Additionally, it reverses the downgraded Hepatitis B vaccine recommendations from the December 2025 ACIP meeting.
Under Kennedy’s proposed change, HHS would have recommended immunizations for only 11 diseases. Those diseases included measles, mumps, rubella, polio, pertussis, tetanus, diphtheria, Hib, pneumococcal disease, HPV, and varicella. It no longer recommended vaccines for flu, rotavirus, hepatitis A, hepatitis B, some forms of meningitis, and RSV.
The ruling restored protections that had been in place for millions of children. Furthermore, it confirmed that vaccine policy changes must follow established legal and scientific procedures.
Key Vaccines Removed Under Kennedy’s Schedule
- Influenza (flu)
- Rotavirus
- Hepatitis A and Hepatitis B
- RSV
- Certain meningitis strains
Why Did the Judge Rule Against HHS?
Murphy said vaccine recommendation decisions have always followed a clear method. That method is scientific in nature. It is also codified into law through procedural requirements.
He found that Kennedy’s reconstitution of the vaccine advisory panel was likely illegal. The changes to the childhood vaccine schedule in January were also likely illegal. Specifically, those policy changes violated the Administrative Procedure Act. This law governs how federal agencies must consider and implement policy changes.
The court found the CDC had bypassed the standard deliberative process entirely. Murphy found that the CDC bypassing ACIP was both a “technical, procedural failure” and “an abandonment of the technical knowledge and expertise embodied by that committee.”
Impact on ACIP and Its Members
Kennedy’s Appointed Committee Members Are Blocked
The judge ruled that Kennedy’s decision last June to fire all 17 ACIP members was in violation of federal procedures. He replaced them with handpicked members.
Murphy’s 45-page ruling stayed the appointment of 13 new ACIP members. These members were appointed between June 2025 and January 2026. Those changes had reduced the number of routine childhood vaccinations from 17 to 11 diseases.
As a direct result, an ACIP meeting scheduled for March 18–19 has been postponed. The committee had planned to discuss COVID-19 vaccine safety and long COVID at that session.
What ACIP Does and Why It Matters
Since 1964, all US vaccine policy has first run through ACIP. It is an independent panel of vaccine experts. They evaluate research to determine how safe and effective each vaccine is. The CDC director then takes the committee’s advice into consideration before making a recommendation.
Medical Groups React With Approval
The preliminary injunction came in response to a lawsuit filed by the American Academy of Pediatrics, American Public Health Association, American College of Physicians, Infectious Diseases Society of America, and Society for Maternal-Fetal Medicine, among others.
Medical professionals across the country welcomed the decision. Ronald G. Nahass, MD, President of the Infectious Diseases Society of America, responded strongly. He stated that Secretary Kennedy has caused needless confusion and distrust in vaccine guidance. Unless stopped, his actions will continue to result in preventable disease outbreaks.
The plaintiffs’ legal counsel also hailed the outcome. Richard Hughes IV, representing the plaintiffs including the American Academy of Pediatrics, called the ruling a “tremendous victory for science, for public health, and for the rule of law.”
HHS Plans to Appeal the Decision
HHS indicated it would not accept the ruling without a fight. HHS spokesperson Andrew Nixon said the department “looks forward to this judge’s decision being overturned just like his other attempts to keep the Trump administration from governing.”
DOJ lawyers argued that Kennedy had broad authority to make these changes. They cited a decline in public trust in vaccines following COVID-19. The appeal process is expected to move quickly. The public health stakes are significant.
What This Means for Children’s Health
As Kennedy’s policies took hold, pediatricians faced parents who grew increasingly skeptical. Nearly a dozen states began considering legal changes. Those changes would relax vaccine requirements for school enrollment.
Moreover, 28 states have already altered their guidance to not follow HHS or ACIP’s recommendations. This ruling serves as a critical checkpoint. It addresses both the legal question and the broader challenge of restoring public confidence in vaccines.
Routine vaccination schedules are not mandates. However, they are the foundation of preventive care for children. They also form the backbone of the nation’s immunization infrastructure. Restoring the original schedule is widely seen as necessary. It protects children from preventable diseases.
