Figure 3. Chest radiographs of two patients with severe acute respiratory syndrome (SARS). a–c: radiographs of patient 5 showing progression of changes. a, day 8 of symptoms; b, day 13 of symptoms, d, day 14 of symptoms. He died on day 19 of this illness. d, chest radiograph, taken on day 8 of symptoms, of patient 12, with right upper lobe infiltrates resembling pulmonary tuberculosis (TB) but laryngeal swab cultures for TB were negative.