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Congress has poured tens of billions of dollars into public health since last year. While health officials who have juggled bare-bones budgets for years are grateful for the money, they worry it will soon dry up, just as it has after previous crises such as 9/11, SARS and Ebola. Meanwhile, they continue to cope with an exodus from the field amid political pressure and exhaustion that meant 1 in 6 Americans lost their local health department leader.