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."

Robert F. Kennedy Jr. has announced that his department will end funding for a series of mRNA-based vaccines aimed at preventing major respiratory illnesses.

Jerome Adams, who served as U.S. surgeon general in President Donald Trump ’s first administration, on Sunday issued a forceful rebuke of Health and Human Services Secretary Robert F. Kennedy Jr.’s response to a recent shooting at the headquarters of the U.S. Centers for Disease Control and Prevention in Atlanta.