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EasyPediatricsBronchiolitisus-usmle-step-2us-usmle-step-3

A 6-month-old infant presents with a 2-day history of cough, rhinorrhea, and poor feeding. Today she has increased work of breathing with nasal flaring and intercostal retractions. Respiratory rate is 60 per minute, and oxygen saturation is 90 percent on room air. Auscultation reveals diffuse wheezes and crackles. What is the most likely diagnosis?

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