In a moment that redraws the boundaries of institutional authority, the newly appointed CDC director has publicly confirmed that Robert F. Kennedy Jr. — a vaccine skeptic holding no formal agency role — wields final decision-making power over the nation's premier public health body. The acknowledgment arrives as the CDC manages a measles outbreak and a deepening crisis of public trust, raising enduring questions about whether scientific consensus can survive when its stewardship is placed outside the hands of scientists. Throughout history, the independence of public health institutions has be