Exposure to vehicular traffic is associated to a higher risk of hospitalization for bronchiolitis during the first year of life

BACK GROUND: The most common cause of hospitalization for children younger than age one is bronchiolitis. Several prenatal and environmental risk factors may affect the incidence of hospitalization for bronchiolitis. The aim of this study was tninvestigate the relation between exposure to vehicular traffic and the incidence of hospitalization for bronchiolitis in children during their first year of life in Italy.