Lead levels in kids' blood shot up just after Flint, Michigan changed its water supply and didn't fall until months later, federal health officials confirmed Friday.
They said children who drank Flint water had a 50 percent higher risk of dangerously elevated blood lead levels than before the switch.
The analysis from the Centers for Disease Control and Prevention cannot say just how many children were affected, or what it might mean for their futures. But it does confirm that the water poisoned them.
"What we have documented is there is a clear increase in blood lead levels in the children who were screened over time," said Patrick Breysse, director of the CDC's National Center for Environmental Health, who led the analysis.
"It provides a sound basis for providing services to children in Flint."
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