Severity of respiratory syncytial virus bronchiolitis is increased in children with passive smoking exposure

Background: Respiratory syncytial virus (RSV) bronchiolitis is one of the most common causes for hospitalization in the first year of life. Second-hand cigarette smoke (SHS) has been shown to increase the severity of respiratory illnesses and as a major metabolite of Nicotine, urinary Cotinine has been shown to be a reliable marker for SHS exposure. Aim of this study was to compare severity of RSV bronchiolitis in children with and...