Childhood exposure to PCBs lowers immune response to vaccines

06/21/2010 | HealthDay News

A study of almost 600 children found that those with early exposure to the environmental pollutants polychlorinated biphenyls may have a reduced immune response to tetanus and diphtheria vaccines. Higher concentrations of PCBs, especially at age 18 months, were linked with lower diphtheria and tetanus antibody levels at ages 5 and 7, the researchers said.

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