Adams, who served as surgeon general during the first Trump administration, said Kennedy's assertions about the efficacy of mRNA vaccines are "simply not true."

Former U.S. Surgeon General Jerome Adams — who served in President Trump's first term — tells "Face the Nation with Margaret Brennan" that "people are going to die" if the U.S. backs away from mRNA research,

Health Secretary Robert F. Kennedy Jr.'s decision to cut federal funding for mRNA vaccine research is the latest in a series of moves that have the potential to crush future medical breakthroughs and accelerate a brain drain.