Robert F. Kennedy Jr. clinched the political support needed to become the nation’s top health official by pledging to work within the decades-old federal system for approval and use of vaccines. The Food and Drug Administration will soon “unleash a massive framework” for how vaccines are tested and approved, according to Commissioner Marty Makary. Details aren't yet public but the plan is being overseen by the agency's new vaccine chief, Dr. Vinay Prasad, an outspoken critic of FDA's handling of COVID-19 boosters.