Respiratory System Disorders v Pediatric pulmonary diseases account for almost 50% of deaths in children under age 1 year and 20% of all hospitalization of children under age 15 years. Bryce et al. WHO estimates of the causes of death in children. Lancet 2005v Respiratory tract infections represent the most common infections of childhood and range from trivial to life threatening illness. Other diseases of this system include asthma, disorders of pleura or pleura cavity, lung tumor, congenital