Prasad's exit ends a tumultuous tenure during which he led a reworking of agency guidelines on COVID vaccines and his office got embroiled in controversy over a Duchenne gene therapy.

Dr. Vinay Prasad, the controversial critic of the US Food and Drug Administration who took a top role at the regulatory agency in May, has resigned less than three months into the job.

Indian-origin scientist Vinay Prasad resigned as the FDA's vaccine and gene therapy chief in just three months after backlash over halting Sarepta's DMD gene therapy on safety grounds. His caution drew criticism from patients,