A 68-year-old man with idiopathic pulmonary fibrosis presents with acute worsening of dyspnea over 48 hours. Chest X-ray shows new bilateral infiltrates. Temperature is normal, WBC count is 6,000. What is the most appropriate initial treatment Oxygen saturation is 94% on room air.?
The answer and explanation are revealed in 5 hours (6:00 New York time).
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