Snapshot A 43-year-old woman presents to a hospital in Singapore with a 6-day history of fever, headache, myalgias, and a 2-day history of a nonproductive cough. She recently traveled to China on business where she recalls having a sick contact while taking the train. Her temperature is 100.5°F (38.1°C). On physical exam, the patient is lethargic. Chest radiograph shows diffuse interstitial infiltrates. Tests for Legionella, Mycoplasma, and Chlamydia and immunofluorescence for influenza A and B, adenovirus, and respiratory syncytial virus were negative. Laboratory testing is significant for lymphopenia and an elevated lactate dehydrogenase. Introduction Definition login to view 1 more bullet Epidemiology First reported in Asia ETIOLOGY Pathophysiology login to view 1 more bullet Presentation Symptoms login to view 8 more bullets Imaging Chest radiography login to view 2 more bullets Studies Labs login to view 3 more bullets Treatment Treatment is typically supportive login to view 2 more bullets Complications Respiratory failure Prognosis Worse prognosis login to view 4 more bullets