Scientists fear Trump's administration could undermine public health achievements, with Robert F. Kennedy Jr. potentially leading a radical antiestablishment movement. Vaccine mandates, new vaccine approvals, and FDA decisions could be impacted, along with potential mass firings of dissenting scientists. Kennedy and allies advocate for dramatic public health changes, criticizing government agencies for promoting unhealthy practices and dangerous drugs. The potential for significant changes in federal health agencies, including the NIH and CDC, is concerning to many health professionals.