The US health secretary is cutting funding for mRNA vaccines because he claims they are less effective than other types – but that's not what the evidence shows

Research shows mRNA vaccines saved millions of lives during the COVID-19 pandemic. Now scientists are using that Nobel Prize-winning technology to try to develop vaccines and treatments against a long list of diseases including cancer and cystic fibrosis.

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