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MediumPaediatricsCroupukmlamrcgp aktpanemrcem sbamrcp part 1

A 4-month-old infant presents with a harsh 'barking' cough, hoarse voice, and inspiratory stridor, worse at night. Symptoms started after a couple of days of coryza. The infant is afebrile and examination reveals mild subcostal recession but is otherwise comfortable at rest. What is the most appropriate initial treatment?

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