The purpose of this study has two major goals: 1) to measure the amount of two specific hormones interleukin (IL)-10 and interleukin (IL)-12p70 in mucous and blood; and 2) compare the hormone levels in two specific areas of the lung called the trachea (upper airway) and the bronchioles (lower airway). The hormones IL-10 and IL-12p70 are cytokines, special hormones cells use to communicate with each other during inflammation or infection. Cytokines can be measured in mucous and blood. The balance of one cytokine compared to another help doctors to understand how people respond differently to infection. Unfortunately, the amount of IL-10 and IL-12p70 is not known in children, especially children with a lung infection. In addition, we do not know if the balance of these cytokines differ in various regions of the lung. We believe the balance of IL-10 and IL-12p70 is similar whether measured in the upper or lower airways.