President Donald Trump's former surgeon general, Dr. Jerome Adams, has a stark warning about the potential ramifications of Health and Human Services Secretary Robert F. Kennedy Jr. canceling funding for mRNA vaccine development.

Latest move to cut funding for vaccines is not down to US health secretary. It is part of Trump’s wider war on science.

President Donald Trump's former surgeon general, Dr. Jerome Adams, has a stark warning about the potential ramifications of Health and Human Services Secretary Robert F. Kennedy…

"How you respond to a crisis defines a leader," Jerome Adams told CBS's "Face the Nation."