We will recruit 30 healthy control children in the same age range to compare the EBC pH values in children without allergic or other chronic pulmonary diseases. In addition, we will recruit 30 children (10 in each group) with CGD, RIND, and Job's to compare exhaled breath condensate pH and exhaled nitric oxide values to those from children with allergic airway inflammation to determine if these methods are useful for early diagnosis of infectious airway inflammation.