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?

The Trump Administration's quest to “Make America Healthy Again” is targeting ultraprocessed foods. Think sugary cereals, frozen pizzas, chips, soda and ice cream tied to high rates of obesity and other disease.