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During his Senate confirmation hearings, Health Secretary Robert F. Kennedy Jr. suggested he wouldn鈥檛 undermine vaccines.

He also said he wouldn鈥檛 halt congressionally mandated funding for vaccination programs, nor impose conditions that would force local, state or global entities to limit access to vaccines or vaccine promotion.

鈥淚鈥檓 not going to substitute my judgment for science,鈥� he said.

Yet the Department of Health and Human Services under Kennedy took unprecedented steps to change how vaccines are evaluated, approved and recommended 鈥� sometimes in ways that run counter to established scientific consensus.

Childhood vaccine schedule

Sen. Bill Cassidy, a physician who was unsettled about Kennedy鈥檚 antivaccine work, said Kennedy pledged to him that聽聽existing vaccine recommendations.

"I recommend that children follow the (Centers for Disease Control and Prevention) schedule. And I will support the CDC schedule when I get in there,鈥� Kennedy said at his Senate confirmation hearing.

Kennedy also said he thought the polio vaccine was safe and effective and that he wouldn鈥檛 seek to reduce its availability.

However, 碍别苍苍别诲测听聽the childhood vaccine schedule that prevents measles, polio and other dangerous diseases. And the National Institutes of Health in early March聽聽about ways to improve vaccine trust and access.

贬别听聽April 9 that 鈥減eople should get the measles vaccine, but the government should not be mandating those,鈥� then continued to raise safety concerns about vaccines.

On May 22, 碍别苍苍别诲测听聽that, among other things, questioned the necessity of mandates that require children to get vaccinated for school admission and suggested that vaccines should undergo more clinical trials, including with placebos. The report has to be reissued later because the initial version cited聽.

CDC vaccine recommendations

At the confirmation hearing, Cassidy asked Kennedy: "Do you commit that you will revise any CDC recommendations only based on peer review, consensus based, widely accepted science?"

Kennedy replied, 鈥淎bsolutely,鈥� adding he would rely on evidence-based science.

Yet on Feb. 20, HHS聽聽of outside vaccine advisers.

The CDC鈥檚 vaccine advisory panel met April 16 and聽聽that people 50 to 59 with certain risk factors should be able to get vaccinated against respiratory syncytial virus, and endorses a new shot that protects against meningococcal bacteria. As of late June, the CDC and HHS haven鈥檛 acted on the recommendations.

碍别苍苍别诲测听聽May 27 that COVID-19 vaccines are no longer recommended for healthy children and pregnant women 鈥� a move immediately questioned by several public health experts. No one from the CDC, the agency that makes such recommendations,聽聽in the video announcing the changes.

On聽June 9, 碍别苍苍别诲测听聽all 17 members of the science panel that advises the CDC on how vaccines should be used.聽Two days later, 碍别苍苍别诲测听聽new vaccine policy advisers to replace the panel he dismissed. They include a scientist who rose to prominence by relaying conspiracy theories around the COVID-19 pandemic and the vaccines that followed, a leading critic of pandemic-era lockdowns, a business school professor and a nurse affiliated with a group that is widely considered to be a leading source of vaccine misinformation.

The panel聽聽Wednesday that it will establish a work group to evaluate the 鈥渃umulative effect鈥� of the children鈥檚 vaccine schedule. The same day, Kennedy announced the U.S.聽聽the vaccines alliance Gavi. He accused the group, along with the World Health Organization, of silencing 鈥渄issenting views鈥� and 鈥渓egitimate questions鈥� about vaccine safety.

Kennedy's vaccine advisers聽聽Thursday that people receive flu shots free of an ingredient that antivaccine groups have falsely tied to autism. The vote came after a presentation from an anti-vaccine group鈥檚 former leader. A CDC staff analysis of past research on the topic is removed from the agency's website because, according to a committee member, the report wasn't authorized by Kennedy鈥檚 office.

Vaccine approvals and review standards

At the Senate hearing, Cassidy asked Kennedy if he would keep FDA's historically rigorous vaccine review standards.

鈥淵es,鈥� Kennedy replied.

Kennedy forced the FDA鈥檚 top vaccine official聽聽March 29. The official, Peter Marks, said he feared Kennedy鈥檚 team might聽聽from a vaccine safety database.

On May 6, Kennedy named聽, an outspoken critic of the FDA鈥檚 handling of COVID-19 boosters, as the FDA鈥檚 vaccine chief.

After a delay, the FDA聽聽for its COVID-19 vaccine May 16 but with unusual restrictions: The agency says it鈥檚 for use only in adults 65 and older or those 12 to 64 who have at least one health problem that puts them at increased risk from COVID-19.

Top officials聽聽for seasonal COVID-19 shots to seniors and others at high risk May 20, pending more data on everyone else. The FDA urged companies to conduct large, lengthy studies before tweaked vaccines can be approved for healthier people, a stark break from the previous federal policy recommending an annual COVID-19 shot for all Americans 6 months and older.

FDA on聽May 30聽聽made by Moderna but with the same limits on who can get it as Novavax's shot.

Bird flu vaccine

At his confirmation hearing, Kennedy said he would support the development of a vaccine for H5N1 bird flu.

The Biomedical Advanced Research and Development Authority, an HHS agency, on聽May 28聽聽in awards聽to Moderna to develop a vaccine against potential pandemic influenza viruses, including the H5N1 bird flu.