The apparent most likely target is the Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices (ACIP), which “plays a key role in setting vaccine policy. Kennedy and his top aides are also scrutinizing a host of other outside panels, including those that advise the Food and Drug Administration,” according to Politico.

In anticipation of this possibility, before leaving office, President Joe Biden and his HHS Secretary, Xavier Becerra, “approved the appointments of eight new candidates” to ACIP, STAT News reported in January. The medical news outlet called it “a burst of activity within a matter of a few months that could, in theory, make it more difficult for the Trump administration to shape the panel with its own appointees.”

But experts believe that “any attempt to protect the status quo at the ACIP will prove to have been futile. People who sit on this committee have at-will appointments,” they noted.

Multiple news outlets on Thursday reported that ACIP’s first scheduled meeting of the year, slated for next week, has now been postposed, a development raising concerns.

Dr. Angela Rasmussen, a noted virologist, responded on social media to the rescheduling, remarking: “This is how RFK Jr will administratively destroy vaccination programs.”

U.S. Senator Bill Cassidy is a Louisiana Republican and a medical doctor who “co-founded the Greater Baton Rouge Community Clinic, a clinic providing free dental and health care to the working uninsured,” his Senate bio reads. “Bill also created a private-public partnership to vaccinate 36,000 greater Baton Rouge area children against Hepatitis B at no cost to the schools or parents. In the wake of Hurricane Katrina, Bill led a group of health care volunteers to convert an abandoned K-Mart building into an emergency health care facility, providing basic health care to hurricane evacuees.”

Politico reports that the assurances RFK Jr. “provided helped clinch his confirmation, after Senate HELP Committee Chair Bill Cassidy (R-La.) said he received commitments that changes would not be made to the CDC’s vaccine committee.”

On February 4, standing on the floor of the Senate, Dr. Cassidy delivered a speech detailing those commitments.

“After seeing patients die from vaccine preventable diseases, I dedicated much of my time to vaccine research and immunization programs. Personally witnessing the safety monitoring, and the effectiveness of immunization. But simply, vaccines save lives,” Cassidy said (archived).

“This is the context that informed me when considering Robert F. Kennedy Jr as the nominee to be Secretary of the Department of Health and Human Services,” Cassidy continued, explaining why he was choosing to vote to confirm RFK Jr. “Regarding vaccines, Mr. Kennedy has been insistent that he just wants good science and to ensure safety. But on this topic, the science is good, the science is credible. Vaccines save lives. They are safe. They do not cause autism. There are multiple studies that show this. They are a crucial part of our nation’s public health response.”

Crucially, Senator Cassidy said that Kennedy “committed that he would work within the current vaccine approval and safety monitoring systems, and not establish parallel systems. If confirmed, he will maintain the Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices [ACIP] without changes.”

Cassidy was not the only Republican who voted to confirm Kennedy based on commitments he personally made to them.

Defending her vote to confirm Kennedy, widely recognized as one of the least qualified among all of President Donald Trump’s cabinet nominees, U.S. Senator Lisa Murkowski (R-AK) issued a lengthy statement repeatedly explaining that RFK Jr. had made “commitments” to her, personally, that were sufficiently satisfying to earn her vote — despite his lengthy reported history of anti-vaccine activism, his statement that, in his opinion, “There’s no vaccine that is, you know, safe and effective,” and what has been recorded as his documented history of promoting conspiracy theories.

“I continue to have concerns about Mr. Kennedy’s views on vaccines and his selective interpretation of scientific studies, which initially caused my misgivings about his nomination,” declared Senator Murkowski. “Vaccines have saved millions of lives, and I sought assurance that, as HHS Secretary, he would do nothing to make it difficult for people to take vaccines or discourage vaccination efforts. He has made numerous commitments to me and my colleagues, promising to work with Congress to ensure public access to information and to base vaccine recommendations on data-driven, evidence-based, and medically sound research. These commitments are important to me and, on balance, provide assurance for my vote.”

One week ago CNN’s Manu Raju reported, “Asked Lisa Murkowski if she trusts RFK Jr on vaccines, and she said: ‘We are going to hold him accountable and that’s how we will get the trust.'”

Thursday afternoon, the nonprofit Protect Our Care, issued a statement strongly criticizing Senator Cassidy.

“Just one week in, RFK Jr. has already begun enacting some of the most radical parts of his conspiracy theory-filled agenda, breaking promises he made to on-the-fence Senators during his confirmation process. Coverage confirms that RFK Jr. will be removing members of the CDC’s vaccine advisory committee after canceling a critical meeting on vaccine approvals,” the group charged.

“RFK Jr. played Bill Cassidy like a fiddle,” the group’s president, Brad Woodhouse, added. “It hasn’t even been a week and he is already breaking his promises. After saying anything to on-the-fence senators to get confirmed, RFK Jr. is now showing his true colors as the anti-science, anti-vaccine conspiracy theorist he always has been. The consequences of RFK Jr.’s broken promises, which were always bull—, will be more sick and dead Americans, including children, and Senator Cassidy and his colleagues who bought what Kennedy was selling will bear responsibility.”

Earlier this week, the Associated Press reported on another commitment RFK Jr. made to Senator Cassidy, one he appears to be preparing to rescind.

“To earn the vote he needed to become the nation’s top health official, Robert F. Kennedy Jr. made a special promise to a U.S. senator: He would not change the nation’s current vaccination schedule,” the AP reported. “But on Tuesday, speaking for the first time to thousands of U.S. Health and Human Services agency employees, he vowed to investigate the childhood vaccine schedule that prevents measles, polio and other dangerous diseases.”