RFK Jr. has claimed measles can be treated with vitamin A and that severe infection is linked to poor diet. But many experts who spoke with ABC News disagreed.

When Robert F. Kennedy Jr. was confirmed as America’s secretary of health and human services, neutral observers might have asked themselves: Would it be possible for a lawyer who had questioned the safety of childhood vaccinations for two decades to look at the available data and reconsider his views?

Robert F. Kennedy Jr., the nation’s new health secretary, has cited “highly chemically processed foods” as a chief culprit behind an epidemic of chronic disease in the U.S., including ailments such as obesity, diabetes and autoimmune disorders.