CDC found that 60 percent of children "Lead Toxicity: Who Is at Risk of Lead Exposure?" http://www.atsdr.cdc.gov/csem/csem.asp?csem=7&po=7 "Lead Toxicity: Who Is at Risk of Lead Exposure?" most at risk https://www.atsdr.cdc.gov/csem/csem.asp?csem=7&po=7 "Lead Toxicity: Who Is at Risk of Lead Exposure?" the CDC