Children near DuPont plant exposed to more PFOA than moms.

The study was undertaken by scientists who have spent seven years trying to determine whether the DuPont chemical is making people sick in the Mid-Ohio Valley.

The discovery about moms and their children comes as scientists elsewhere linked the chemical, known as PFOA, and related chemicals to reduced effectiveness of childhood vaccinations. The compounds are used to manufacture Teflon cookware, food packaging and other products