Health Department to Drop Thimerosal from Flu Vaccines

The U.S. Department of Health and Human Services (HHS) is moving forward with a recommendation from independent advisors to eliminate thimerosal, a preservative in approximately 4% of flu vaccines. This decision comes despite the absence of evidence linking thimerosal to risks, as it plays a role in preventing bacterial and fungal infections.

However, HHS Secretary Robert F. Kennedy Jr. has not endorsed two additional recommendations from the advisory meeting: one suggesting annual flu vaccinations for everyone over six months, and another advocating for RSV vaccinations for infants.

As the political landscape increasingly influences scientific discussions, federal vaccination policies are shifting. Sometimes, it seems officials are acting contrary to advice from their own scientists. This has led independent scientific organizations to step in, aiming to provide evidence-based guidance.

In light of revised vaccination protocols from the CDC, various medical groups are preparing to issue their own vaccine recommendations. These could clarify for the public, and health insurance providers, which vaccines should be standard, as well as the rationale behind them.

This month, the American College of Obstetricians and Gynecologists (ACOG) announced it would offer new guidance on Covid, flu, and RSV vaccinations during pregnancy. This information is expected to be available by the end of summer, timed before the winter respiratory season.

Other scientific bodies, including the American Academy of Pediatrics and the Infectious Diseases Society of America, are also planning to release similar vaccine guidelines.

These developments are occurring amidst a backdrop of changing vaccination recommendations from U.S. health authorities. Officials, including Kennedy, have imposed new restrictions on Covid vaccines, framing vaccinations, like those for measles, mumps, and rubella, as a personal choice during a resurgent measles outbreak.

The newly formed Vaccine Integrity Project is conducting a comprehensive review of scientific literature related to vaccines, which is expected to conclude in the coming weeks. This volunteer-driven initiative is examining 16,400 publications related to flu, Covid, and RSV vaccines.

Following this review, the involved scientific groups will offer guidance tailored to specific populations, including children, high-risk individuals, pregnant people, and healthy adults. As Michael Osterholm, the epidemiologist leading the project, stated, “We’re not making recommendations ourselves. We’re just providing them with the information.”

This project seeks to fulfill the role traditionally held by the CDC’s advisory committee on immunization practices (ACIP) since 1964. Scott Rivkees, an associate dean at Brown University and former Florida surgeon general, noted that the medical community no longer views the CDC as the definitive authority on vaccine guidance, suggesting a shift toward independent collaboration instead.

According to Osterholm, American families are confronting an “information crisis” as official recommendations become less reliable, leaving parents in confusion over whom to trust. This uncertainty has, alarmingly, led to increased vaccine hesitancy and refusal.

“These changes stem from politics, not science,” Rivkees commented, emphasizing the crucial role of projects like the Vaccine Integrity Project in maintaining what is known to be effective in tackling infectious diseases.

In May, Kennedy announced the CDC’s decision not to recommend Covid vaccines for pregnant individuals, despite strong evidence supporting their safety. ACOG’s CEO highlighted the importance of vaccinations during pregnancy for protecting both the mother and infant.

Other changes have included a shift in CDC’s pediatric Covid recommendations, changing “should” to “may,” alongside increased restrictions on Covid booster eligibility.

Despite these adjustments, Covid continues to present a significant risk. Osterholm pointed out that recent hospitalizations, severe cases, and deaths in children related to Covid surpassed those from influenza, which was especially concerning given it was a particularly severe flu season.

Without the CDC’s recommendations for annual boosters, vaccines for flu and RSV may face uncertain futures. Osterholm indicated this effort is only the beginning, as there are plans for future data examination on other vaccinations.

Rivkees expressed concern about the potential normalization of severe illnesses due to vaccine hesitancy and said that outside guidance could help clarify evidence for both parents and medical providers, as well as assist insurance companies in deciding which vaccines to cover.

Under the Affordable Care Act, insurers must cover vaccines recommended by ACIP, which raises questions about whether this will continue as recommendations evolve.

If vaccination rates decline, Rivkees warned, it could lead to reduced vaccine supplies, which is worrisome. Osterholm added that vaccines ultimately save insurers money by preventing illness, but decisions to support them require a solid foundation of evidence.

The external recommendations serve as a temporary solution, and Osterholm stressed the need for a return to ACIP’s authoritative guidance. He acknowledged that while the Vaccine Integrity Project aims to provide support, the hope is for a reinstatement of robust CDC leadership in the near future, although that prospect seems distant.