Rates of routine childhood vaccination hit a 10-year low in 2023. That, according to the Centers for Disease Control and Prevention, puts about 250,000 kindergartners at risk for measles, which often leads to hospitalization and can cause death. In recent weeks, an infant and two young children have been hospitalized amid an ongoing measles outbreak in Philadelphia that spread to a day care center. It’s a dangerous shift driven by a critical mass of people who now reject decades of science backing the safety and effectiveness of childhood vaccines. State by state, they’ve persuaded legislators…