Redefining ‘concern’ over lead

Federal health agency accedes to two decades of accumulating toxicology data

By Janet Raloff, 15:23 PM May 17, 2012

The Centers for Disease Control and Prevention announced on May 16 that it would no longer designate any particular blood-lead value in children as representing a “level of concern.” Its justification: There is no threshold below which lead exposures are not a concern.

“Because there’s no identified safe exposure level for lead in children, ‘level of concern’ is a misleading statement,” explains Christopher Portier, who directs CDC’s National Center for Environmental Health and the Agency f...

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