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Health Secretary Robert F. Kennedy Jr. announced new initiatives, including a clinic at the National Institutes of Health, aimed at identifying and treating alleged vaccine injuries, as part of a broader administration effort on vaccine safety. The announcements have worried many public health experts, who fear they lend credibility to unsubstantiated vaccine harm claims. Separately, outrage has grown over a CDC decision to allocate $1.6 million to fund a study examining alleged harms of the hepatitis B vaccine, which critics have called unethical. Together, these developments reflect an intensifying clash between the Kennedy-led HHS and mainstream public health scientists over vaccine policy, with critics warning that government-backed skepticism toward established vaccines could undermine public trust and immunization rates.