Respiratory syncytial virus (RSV) is a common cause of lower respiratory tract infections in infants and small chil-

Respiratory syncytial virus (RSV) is a common cause of lower respiratory tract infections in infants and small children worldwide. There is no cure for RSV disease, but immunoprophylaxis using humanized monoclonal antibody has proven to be safe and efficacious in preventing disease. Extensive research supports the hypothesis that RSV bronchiolitis in infancy results in increased risk for development of wheezing, asthma, and possibly atopy throughout childhood. In spite of this, the pathophysiologic mechanisms that are responsible for this association have not been fully elucidated.