This was one in a continuing line of moves that have put Kennedy's vaccine skepticism into public policy, though scientists say the vaccines are safe.

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,