Robert F. Kennedy Jr. has expressed divisive ideas about vaccines, but some applaud his efforts to target ultra-processed foods in Americans' diets.

This week, the Food and Drug Administration — now with vaccine skeptic Robert F. Kennedy Jr. at the helm — unexpectedly and ...

More states are loosening vaccine mandates, scaling back vaccine promotion efforts and taking other steps likely to lower vaccination rates — even as a major measles outbreak spreads in Texas.