Trump has appointed Robert F. Kennedy Jr., a prominent vaccine skeptic, to a "big role" in his health administration, sparking concern across the health sector. Experts fear Kennedy's stance on vaccines could lead to lower immunization rates and increased distrust in public health institutions like the FDA and CDC. Kennedy, lacking medical credentials, has criticized vaccines and federal health agencies, suggesting they contribute to Americans' poor health. Health experts warn that Kennedy's anti-vaccine rhetoric may impact vaccination rates, undermine drug development, and complicate responses to future pandemics.