Exposure to Lead in Childhood

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Abstract
Baghurst et al.1 are to be congratulated for continuing their long-term studies of intellectual deficits in children who were exposed to lead in early childhood. These investigators have identified deficits in intelligence, not just delays in neurobehavioral or motor development, among school-age children that are associated with exposure to lead in early childhood. That children's intellectual performance can be diminished by environmental exposure to a chemical as common as lead appears to startle many. This association has been attacked in both the popular press and the scientific literature. The principal counterassertion is that such deficits are due to other factors . . .