Kennedy Jr.'s nomination to be the nation's top health official is uncertain after a key Republican joined Democrats to raise persistent concerns over the nominee's deep skepticism of routine ...

Robert F. Kennedy Jr.’s frequent questioning of the safety of childhood vaccinations is persisting as an issue in his confirmation hearings to become the Trump administration's top health official.

Robert F. Kennedy Jr.’s opinions about vaccine safety, both past and present, appeared likely to lead at least a few Senate ...