A 2-year-old boy is brought to the emergency department with a barking cough, hoarseness, and inspiratory stridor.
His parents report that he has been sick for 2 days and that his symptoms have been getting worse.
The boy's vital signs are as follows: temperature 102°F (38.9°C), heart rate 120 beats/minute, respiratory rate 28 breaths/minute, and oxygen saturation 95% on room air.
Physical examination reveals a well-developed, well-nourished boy in moderate respiratory distress.
He is using accessory muscles of respiration and has intercostal retractions.
His lungs are clear to auscultation.
Which of the following statements by the nurse is most appropriate?