Attorney General Bonta Co-Leads Multistate Lawsuit to Block Trump Administration’s Unlawful Overhaul to Childhood Vaccine Schedule

1. Press Release
2. Attorney General Bonta Co-Leads Multistate Lawsuit to Block … Tuesday, February 24, 2026 Contact: (916) 210-6000, agpressoffice@doj.ca.gov Lawsuit also challenges Secretary Kennedy’s appointments to key federal vaccine panel

OAKLAND — In partnership with Arizona Attorney General Kris Mayes, California Attorney General Rob Bonta today announced co-leading a multistate lawsuit against the Trump Administration over unprecedented changes that were recently made to the childhood immunization schedule, which will make people sicker and strain state resources. Health and Human Services (HHS) Secretary Robert F. Kennedy, Jr., Acting Centers for Disease Control and Prevention (CDC) Director Jay Bhattacharya, and the CDC and HHS are named as defendants. Filed in the U.S. District Court for the Northern District of California, the complaint challenges a January 5, 2026 "Decision Memo" by the CDC that stripped seven childhood vaccines — those protecting against rotavirus, meningococcal disease, hepatitis A, hepatitis B, influenza, COVID-19, and respiratory syncytial virus (RSV) — of their universally recommended status. The lawsuit also challenges Secretary Kennedy's unlawful replacement of the Advisory Committee on Immunization Practices (ACIP), the expert federal panel that has guided U.S. vaccine policy for decades. The coalition of 14 attorneys general and the Governor of Pennsylvania is asking the court to declare the new vaccine schedule and the new ACIP appointments unlawful, and to enjoin, vacate, and set aside both the new immunization schedule and the ACIP appointments.

“The Trump Administration’s attacks on science are irresponsible and dangerous. Undermining confidence in vaccines will lead to lower vaccination rates and more infectious disease. It will also drive-up costs for states, including increased Medicaid spending and new expenses to combat misinformation and revise public health guidance,” said Attorney General Rob Bonta. “Public health decisions must remain grounded in truth and facts. That’s why, for the 59th time, I’m taking the Trump Administration to court. My fellow attorneys general and I cannot sit on the sidelines while lives are put at risk and our laws are broken.”

“California is going back to court because the Trump Administration is violating federal law and pushing a reckless, unscientific childhood vaccine schedule that puts kids’ lives at risk. These changes ignore decades of medical evidence and will lead to outbreaks of diseases we’ve already beaten,” said Governor Gavin Newsom. “We will not stand by while politics overrides science and endangers our children. Just as we’ve done before, we’re standing up — alongside 14 other states — to defend the law, protect public health, and keep our kids safe.”

Among children born in the U.S. between 1994 and 2023, researchers have estimated that routine childhood vaccinations prevented approximately 508 million cases of illness, 32 million hospitalizations, and over 1.1 million deaths, generating $2.7 trillion in societal savings. This remarkable achievement has been made possible in large part by leading medical scholars and public health experts who have served on the ACIP and established the science-based childhood vaccination schedule that federal agencies, states, and parents have confidently relied on for decades.

Secretary Kennedy is among the most prominent anti-vaccine activists in the country and has significantly contributed to eroding trust in safe and effective vaccines. During Secretary Kennedy’s confirmation process, he made numerous promises in an apparent effort to address concerns about his longstanding anti-vaccine views. One of those promises was that he would not alter the ACIP. The ACIP is a 17-member federal advisory board to the CDC that, under the Federal Advisory Committee Act (FACA), must be “fairly balanced in terms of the points of view represented and the functions to be performed,” and not be “inappropriately influenced by the appointing authority or by any special interest[.]” The ACIP develops recommendations for routine immunization of both pediatric and adult populations, which become official CDC policy upon approval by the CDC Director. Once adopted into the CDC immunization schedule, the ACIP’s recommendations determine which vaccines are covered under several federal supported immunization programs.

In a Wall Street Journal opinion column published on June 9, 2025, and ironically titled “HHS Moves to Restore Public Trust in Vaccines,” Secretary Kennedy abruptly announced that he was dismissing all 17 ACIP members. He subsequently appointed new ACIP members. At least nine of the 13 current ACIP members lack the expertise or professional qualifications required for the role, and a majority have publicly expressed views aligned with Secretary Kennedy's well-documented opposition to vaccines. Among other things, Secretary Kennedy failed to issue the required Federal Register notice, to follow FACA’s “fairly balanced” requirement, and to appoint individuals with scientific qualifications as required by ACIP's own charter.

On December 5, 2025, the ACIP members unlawfully appointed by Secretary Kennedy then voted 8 to 3 to reverse nearly 30 years of CDC policy recommending that the hepatitis B vaccine be universally administered at birth as part of a three-dose series. The hepatitis B vaccine is up to 90 percent effective in preventing perinatal infection when administered within 24 hours of birth. However, the Trump Administration’s reliance on even the unlawfully reconstituted ACIP was temporary. Last month, then-Acting CDC Director Jim O’Neill — who has no medical or scientific background — signed off on a “Decision Memo” that demoted seven vaccines from the universally recommended childhood vaccination schedule to a lesser status that invites confusion and uncertainty. The Decision Memo was not based on any new scientific evidence, any recommendation by a lawfully constituted ACIP, or any systematic review of the available data. Instead, it relied primarily on superficial comparisons to purported "peer countries" — particularly Denmark, which has universal healthcare and a small, homogenous population — while ignoring the fundamental differences between those nations and the United States, as well as the overwhelming evidence supporting the effectiveness of the CDC’s pre-Kennedy childhood immunization schedule.

In response to the lack of science-based leadership from the federal government, California Governor Gavin Newsom announced the creation of the West Coast Health Alliance to create and promulgate communications to the public and to healthcare providers regarding the West Coast Health Alliance’s shared, collective recommendations.

Joining Attorneys General Bonta and Mayes in filing today’s lawsuit are the attorneys general of Colorado, Connecticut, Delaware, Maine, Maryland, Michigan, Minnesota, New Jersey, New Mexico, Oregon, Rhode Island, Wisconsin, and the Governor of Pennsylvania.

The complaint will be linked at the top of this press release when it becomes available.

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