Prior work suggests similar Th2-like (IL-5 and IL-13) cytokine and cellular response to nasal and bronchial allergen challenges when patient cohorts are taken in aggregate. However, within individuals, it was unclear whether nasal responses mirror bronchial responses. (i.e. in a given individual, we do not know whether a nasal response to challenge or drug would have been recapitulated had the bronchus been tested.) This study sought to address this question.