Figure 2From: Toxic metal levels in children residing in a smelting craft village in Vietnam: a pilot biomonitoring study All children had detectable blood lead levels (BLLs). Among the 20 children in the study all had BLLs greater than 5 μg/dL, the CDC’s reference blood level for children. This included five children with BLLs greater than 45 μg/dL, the level at which chelation therapy is recommended.Back to article page