Washington: Children exposed to the widely used pesticide additive piperonyl butoxide (PBO) in the womb have heightened risk of noninfectious cough at ages 5 and 6, a new study has found.The findings support the premise that the children`s respiratory system is susceptible to damage from toxic exposures during the prenatal period. A common symptom, childhood cough can disrupt normal daytime activities and interrupt sleep for both child and parent.
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