PCBs could harm babies' immune system

PCBs could harm babies' immune system
http://www.environmentalhealthnews.org/ehs/newscience/2012/01/2012-0130-early-pcb-exposure-small-thymus/

"Prenatal and early life exposure to high levels of PCBs is associated with a smaller immune organ – the thymus – at birth and at 6-months-old finds a study that is one of the first to identify this anomaly in infants."