Parents Navigate a Fracturing Vaccine Landscape

Rattled by the C.D.C.’s actions and the spread of measles, some parents are scrambling to figure out how to best protect their children.Sabrina and Cameron Scully, parents to a 2-month-old in Denver, said it was unsettling to have the federal vaccine guidelines change so abruptly. “How do you know who to turn to?” Ms. Scully, 30, asked.