There is no safe level of lead for any child, and expectant moms are also affected . Children of color, and children from low-income communities, tend to have the highest exposure levels. We know this for many reasons, including required blood-lead level testing of young children. But we also know that exposure to lead is preventable. Here is a radical thought: what if the public health system worked to eliminate all sources of lead before, not after, children were tested and found exposed. Shouldn’t the nation invest in seeking out and eliminating all sources of lead? In early December, a...