A long list of medical experts are saying Robert F. Kennedy Jr.'s decision to cut mRNA research will set back the country’s vaccine science by a decade.

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.

When COVID-19 cases were surging, Dr. David Wohl saw patients "hungry for air" fill UNC hospital wards. What most saved lives, he said, were vaccines developed with unprecedented speed using mRNA technologies.