Children exposed to PCBs in their first years of life are less likely to develop immunity to disease after they are vaccinated, according to a new study. Overall, the study shows that cumulative exposure to environmental PCBs – particularly leading up to 18 months of age – may decrease immune system development, leaving vaccinated children still at risk for developing disease.
The full article:
http://www.environmentalhealthnews.org/ehs/newscience/vaccines-less-effective-in-kids-exposed-to-pcbs/