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The Atlantic/msn | Getty
Holding her infant patients, Dr. Mona Hanna-Attisha felt a deep sense of frustration. “I’m doing everything I’m supposed to do as a pediatrician,” she told me, describing counseling her patients’ parents about vaccines, a healthy diet, safe sleeping, and car seats. But Hanna-Attisha practices in Flint, the poorest city in Michigan and one in which more than half of children grow up in poverty.