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.

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

US Health and Human Services is “winding down” its mRNA vaccine development and will instead fund other vaccine platforms through the Biomedical Advanced Research and Development Authority, the agency said Tuesday.