You can't turn back the clock

By Andy Coghlan CHILDREN poisoned by lead in America’s inner-city slums have failed to benefit from a drug which flushes the metal from their bodies. This failure suggests that brain damage caused by early exposure to the metal may be irreversible, the researchers say. The failure of the drug “takes away the only quick fix available”, says Walter Rogan of the National Institute of Environmental Health Sciences at Research Triangle Park in North Carolina. “This was the best hope for fixing kids after they’ve been exposed,
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