Kaitlyn is a 4-year-old with a 2-day history of nasal congestion and cough in the early morning. Her mother reports thick, green nasal discharge. She is afebrile, and appetite and sleep are normal. Physical examination reveals: lungs clear to auscultation

Kaitlyn is a 4-year-old with a 2-day history of nasal congestion and cough in the early morning. Her mother reports thick, green nasal discharge. She is afebrile, and appetite and sleep are normal. Physical examination reveals: lungs clear to auscultation, tympanic membranes pearly gray without fluid in a neutral position, no cervical adenopathy, nasal turbinates are red, and clear rhinorrhea and postnasal drip.