It was 1959 and Duguay, of Clearwater, Florida, had polio. It mostly preyed on children and was one of the most feared diseases in the U.S., experts say, causing some terrified parents to keep ...

Kennedy, a longtime vaccine critic, has raised doubts about the safety of shots even as a measles outbreak has sickened more than 1,000 Americans. This week, Kennedy’s health department moved to ...