Arizona Attorney General Kris Mayes is challenging the way federal vaccine policy is being rewritten — and she’s right to do it.

Her lawsuit targets recent actions by the Centers for Disease Control and Prevention under Kennedy that scaled back universal recommendations for seven vaccines: rotavirus, meningococcal disease, hepatitis A, hepatitis B, influenza, COVID-19, and RSV.

But this case isn’t just about the vaccines themselves.

It’s about the process.

As we wrote back in early January, the initial schedule changes created less immediate disruption than the headlines suggested. Insurance coverage didn’t end. School requirements in Arizona didn’t suddenly change. Pediatricians largely kept practicing according to long-standing evidence.

But we also warned that the real threat wasn’t the first round of changes.

The federal vaccine system depends on a structured, evidence-based process led by the Advisory Committee on Immunization Practices. That committee reviews data, debates publicly, and makes formal recommendations. Those recommendations drive insurance coverage mandates, clinical practice, and public messaging.

According to the lawsuit, that process was bypassed (and it was).

Kennedy cleared out ACIP and replaced members. Then, without the standard evidentiary review, a new vaccine schedule was issued. The suit argues the decision memo relied on officials with no statutory role in CDC vaccine policy development.

That’s a shortcut. And shortcuts in public health policy matter… especially when they involve immunization infrastructure that protects millions of kids.

Here’s the bigger issue: Kennedy is likely to remain in this role for 2.8 more years. If process shortcuts go unchallenged now, the risk becoming legally normalized.

That’s why this lawsuit matters.

Even when the immediate policy change seems modest, defending the process is important. The judicial branch is one of the few institutional guardrails available right now. Challenging procedural violations slow down Kennedy’s unilateral actions.

Protecting evidence-based vaccine policy isn’t only about today’s schedule. It’s about preserving the decision-making framework for the next several years.

Kudos to AG Mayes for taking up the mantle and defending evidence based public health policy.