Congressional lawmakers have repeatedly pinned the blame on Health and Human Services Secretary Robert F. Kennedy Jr. for recent measles outbreaks, but he told lawmakers Wednesday that the problem started long ago. “It started before I came to office,” he told the Senate Committee on Health, Education, Labor and Pensions. Of children affected by the disease, 80% are over five years old, he said, meaning their decision not to vaccinate predated his appointment last year. The U.S. recorded 2,288