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Prenatal exposure to smoke linked to severe asthma symptoms
HealthyCal.org

Children with severe asthma are far more likely to have been exposed to tobacco smoke before birth than children with a mild form of the disease, according to a new study led by researchers at UC San Francisco. The prenatal exposure was also associated with more daily and night-time asthma symptoms and nearly four times the number of emergency room visits, according to the study.

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