Wheezing disorders in infants and young children are among the most common and most challenging problems facing the pediatrician. The authors, leaders in the field of pediatric respiratory disease, have prepared this book with the aim of better familiarizing clinicians with this often perplexing clinical problem. Focusing on practical issues, the authors expose the lack of existing data on the etiology and pathophysiology of the disease process, outline the optimal approach to diagnosis and management, and discuss the importance of early wheezing as a predictor of the future development of chronic respiratory symptoms later in life.