Health Secretary Robert F. Kennedy Jr. Is rewriting the rules of membership for a key vaccine advisory panel, according to a document published by his department on Monday, after a judge last month declared most of his prior selections unqualified and set their decisions on hold.
A Legal Challenge and Charter Renewal
The Advisory Committee on Immunization Practices (ACIP), which advises the Centers for Disease Control and Prevention on vaccine use, had been a major focus in Kennedy’s efforts to reshape U.S. Vaccine policy. On March 16, U.S. District Judge Brian Murphy concluded that ACIP had been unlawfully reconstituted after Kennedy removed and replaced all 17 independent experts with new members.
Murphy’s decision pointed to the panel’s charter, which stipulated that members must have expertise in vaccine use, research, and immunization practices. On Monday, the Department of Health and Human Services, led by Kennedy, published a renewal of the charter that broadens the list of expertise for potential members, impacting recommendations for vaccine use, including the U.S. Childhood immunization schedule.
Changes to Membership Requirements
A previous version of the charter, signed by Kennedy in December, required panel members to be knowledgeable about immunization practices and public health, with expertise in clinical vaccine use, preventive medicine, vaccine research, efficacy, or safety. Two former ACIP members stated the new charter appears to broaden these requirements, listing specialists in biostatistics and toxicology as examples.
Murphy stated that only six of the 15 members Kennedy initially appointed had meaningful experience in vaccines. HHS spokesman Andrew Nixon downplayed the significance of the changes, stating the ACIP charter renewal is a “routine statutory requirement” and does not indicate a broader policy shift.
The charter revision followed a March 25 letter from attorney Aaron Siri, representing Informed Consent Action Network, recommending changes to the ACIP charter. The group argued that the 13 members whose qualifications were challenged in Murphy’s decision “do have the requisite experience.”
Frequently Asked Questions
What did Judge Murphy conclude in his March 16 decision?
Judge Murphy concluded that ACIP had been unlawfully reconstituted after Kennedy removed and replaced all 17 independent experts, violating the Federal Advisory Committee Act.

What changes were made to the ACIP charter?
The renewed charter broadens the list of expertise for individuals who could serve on the panel, listing examples of specialists in biostatistics and toxicology.
How did HHS respond to concerns about the changes?
HHS spokesman Andrew Nixon stated that the ACIP charter renewal is a “routine statutory requirement” and does not signal a broader policy shift.
As of now, the administration has not appealed Murphy’s ruling, but has a 60-day window to do so.
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