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,

Canadian doctors and scientists say Robert F. Kennedy Jr.'s defunding of mRNA vaccine development projects will have negative health effects in Canada and around the world.