An 18-month-old toddler, Estaban, presents with his father for a sick visit. The child, who is typically healthy and UTD with immunizations, has had URI-like symptoms for the past 6 days with congested cough and clear to yellow nasal discharge. Per parental report, Esteban is drinking fluids without difficulty and has a slightly reduced appetite and had a single episode of post tussive vomiting 3 days ago. For the past 36 hours, his father reports increased crankiness and intermittent f...