Within minutes after encounter with an allergen, individuals with allergic rhinitis show symptoms of nasal itching, nasal congestion, sneezing, and a runny nose. These symptoms generally subside within 30 minutes, but reappear several hours later. Analysis of the nasal epithelium in such an individual 6 hours after allergen encounter would show:

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The symptoms of allergic rhinitis are caused by an allergic response, which is characterized by the infiltration of inflammatory cells such as eosinophils, basophils, neutrophils, T cells, and macrophages into the nasal epithelium. Six hours after allergen encounter, the inflammatory response would still be ongoing, and these cells would be present in the nasal epithelium.

Within Minutes After Encounter with an Allergen, Individuals with Allergic