A Sweeping Review of U.S. Childhood Vaccine Policies

Health and Human Services Secretary Robert F. Kennedy Jr. has replaced key advisory panels, withdrawn scientific studies, and altered federal recommendations—coinciding with a significant rise in measles cases and pushback from medical organizations and federal courts.

Changes to the Childhood Vaccine Schedule

The Centers for Disease Control and Prevention's (CDC) Advisory Committee on Immunization Practices (ACIP), established in 1964, is reviewing the routine childhood vaccination schedule, which outlines over 30 doses protecting against more than a dozen diseases.

Committee Composition

Secretary Kennedy replaced all 17 incumbent ACIP members in June 2025. The new committee includes individuals who hold vaccine-skeptic views. A federal judge temporarily blocked votes by the new members and paused changes to the childhood vaccine schedule that had reduced recommended shots from 17 to 11.

Recommended Changes

The CDC removed universal recommendations for seven immunizations: respiratory syncytial virus (RSV), meningococcal disease, flu, COVID-19, hepatitis A, hepatitis B, and rotavirus. These vaccines are now recommended only for high-risk children or following consultation between doctors and parents.

The working group is also considering:

• Removing aluminum compounds (adjuvants) used to enhance vaccine effectiveness
• Separating the measles, mumps, and rubella (MMR) vaccine into individual injections
• Delaying the hepatitis B vaccination for infants, which has historically been given at birth

The committee is expected to vote on a change to the universal hepatitis B recommendation for newborns.

Arguments for changing the policy note that hepatitis B is often transmitted through sexual contact and drug use, suggesting screening pregnant women could suffice.

Arguments against the change note the virus can spread through contact with infected bodily fluids or contaminated objects, and over 90% of infected infants develop chronic infections, increasing risks for liver disease and cancer.

An analysis presented at past ACIP meetings indicated that delaying the vaccine by even a few months could result in over $222 million in additional healthcare costs and hundreds of preventable deaths annually.

FDA Actions on Vaccine Studies and RSV Shots

Withdrawn Studies

The Food and Drug Administration (FDA) withdrew the publication of studies tracking the safety of COVID-19 and shingles vaccines. An HHS spokesperson stated the studies were withdrawn because authors drew broad conclusions not supported by data.

RSV Shots Review

The FDA announced a review of the safety of monoclonal antibody shots designed to protect infants against RSV, which is the most common cause of infant hospitalization in the first year of life. According to a February CDC survey, over half of U.S. infants have received one of these shots, which are approximately 80% effective at preventing RSV-related intensive care admissions. Manufacturers Sanofi and Merck confirmed their cooperation with the review and maintain the shots are safe.

CDC Website Updates and Scientific Consensus

Autism Statement

The CDC altered its official position regarding a potential link between vaccines and autism. The agency's website now states that a link "cannot be ruled out," departing from its prior assertion that no such link exists. The main CDC webpage still displays a header stating "Vaccines do not cause autism," with a footnote clarifying the header was retained due to an agreement with Senator Bill Cassidy (R-La.).

Several medical organizations responded to the change:

• The American Academy of Pediatrics stated that over 40 studies across seven countries involving more than 5.6 million individuals since 1998 have concluded there is no link.
• The Autism Science Foundation described the new statement as demonstrating a "lack of understanding of the term 'evidence.'"
• Dr. Paul Offit, director of the Vaccine Education Center at the Children's Hospital of Philadelphia, characterized the changes as consistent with anti-vaccine rhetoric.

A 1998 study linking the MMR vaccine to autism was retracted due to being fraudulent.

Internal CDC Concerns

Dr. Demetre Daskalakis, a former top CDC official who departed in August, indicated that career scientists were not involved in developing the updated language. Two anonymous current CDC staffers expressed concerns that the updates raise questions about the agency's credibility.

Funding and Research Cuts

Under Secretary Kennedy's leadership:

• The government canceled at least $500 million in federally funded mRNA vaccine development
• The CDC withdrew $11 billion in COVID-era grants supporting local health department programs; a federal judge later ordered HHS to distribute these funds
• The National Institutes of Health withdrew research grants for studies on vaccine hesitancy
• The CDC ended a public awareness campaign promoting the flu vaccine in February 2025

Alignment with Denmark and International Comparisons

President Trump issued a memorandum directing Secretary Kennedy and the acting CDC director to align U.S. recommendations with best practices from peer nations, specifically citing Denmark.

Denmark's routine childhood immunization schedule recommends vaccination against 10 diseases. The U.S. schedule had historically recommended universal vaccination against 16 diseases before the recent reduction.

Experts cited significant differences between the two countries:

Josh Michaud of KFF stated the U.S. schedule aligns closely with recommendations in 30 countries in the European Center for Disease Prevention and Control, noting "it is Denmark that seems to be the outlier here in terms of recommending very few vaccines."

Other Nordic countries including Sweden, Norway, and Finland cover more diseases than Denmark.

Congressional Testimony

House Ways and Means Committee (March 2026)

Secretary Kennedy testified before the House Ways and Means Committee. He stated his agency is ending policies he said contributed to a chronic disease epidemic and implementing policies prioritizing American health. The Trump administration has proposed cutting the HHS budget by approximately $16 billion, a 12.5% reduction.

During questioning:

• Representative Mike Thompson (D-CA) stated: "Kids have died because measles is running rampant under your watch. Your dangerous conspiracy theories are undermining safe and effective vaccines."
• Representative Linda Sánchez (D-CA) asked about the death of an unvaccinated child from measles in Texas. When asked if the measles vaccine could have saved the child, Kennedy replied: "It's possible – certainly."
• Sánchez also questioned the CDC's decision to end a flu vaccine awareness campaign.
• Representative Gwen Moore (D-WI) asked about proposed cuts to nutrition programs (WIC and SNAP) and how they align with goals to reduce chronic disease in children. Kennedy said he was "not happy" with the proposed cuts.

Senate Committee Hearings (2026)

During separate testimony, Kennedy stated: "I've never been anti-vaccine." He attributed decreased vaccination rates to public distrust stemming from government communications during the COVID-19 pandemic. Regarding the potential loss of U.S. measles elimination status, Kennedy stated the outbreak was part of a "global epidemic" and had "nothing to do with me."

Senator Bill Cassidy (R-La.), who cast the tie-breaking vote to recommend Kennedy's confirmation in February 2025, has stated that commitments Kennedy made regarding regular collaboration and maintaining vaccine policy systems have largely not been fulfilled.

Measles Outbreak and Public Health Concerns

The U.S. recorded more than 2,200 measles cases in 2024 and more than 1,700 infections so far in 2025. The increase in cases could lead to the U.S. losing its measles elimination status, which was declared in 2000.

Dr. Raynard Washington, director of the Mecklenburg County Public Health Department, noted an increase in measles and pertussis cases in his area. Several independent medical organizations, including the American Academy of Pediatrics, the American Academy of Family Physicians, and the Vaccine Integrity Project at the University of Minnesota, have begun issuing their own independent vaccination recommendations in response to the policy changes.

Legal and Policy Context

A federal judge in Boston issued a temporary block on policies from Secretary Kennedy aimed at modifying federally backed childhood vaccines and other regulations. Legal experts, including Dorit Reiss of the University of California, San Francisco, indicated that bypassing established processes for major policy changes could expose the administration to legal challenges.

The U.S. Supreme Court is considering a case that could limit the authority of federal agencies, including the CDC and FDA.

This report was compiled from multiple news sources covering the same events.