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."

Jerome Adams, the U.S. Surgeon General under President Trump's first term, is criticizing his administration's cuts to mRNA vaccine research.

President Trump’s first-term surgeon general, Jerome Adams, sharply criticized the decision by Health and Human Services (HHS) Secretary Robert F. Kennedy Jr. on Tuesday to pare back investments