WASHINGTON - An 18-year-old from Ohio who famously inoculated himself, against his mother's wishes, in December says he attributes his mother's anti-vaccine ideology to a single source: Facebook. Ethan Lindenberger, a high school senior, testified Tuesday before the Senate Committee on Health, Education, Labor and Pensions, underscoring the importance of "credible" information. In contrast, he said, the false and deep-rooted beliefs his mother held -- that vaccines were [...]