She was a vaccine-hesitant mom. Scorn kept her silent. Here’s what changed her mind

A few months before the birth of her fourth baby, Tara Hills, then a 29-year-old mom living in suburban Ottawa, made a decision she would come to regret. She chose to stop vaccinating her children. Hills can't point to any one event or encounter that swayed her. It was more like a trickle," she said. A collection of uncertainties that grew from things she read on the internet or conversations on park benches with other moms, and left her with a vague but growing sense of alarm. The doubts just kind of settled there and piled up."