Of the patients presenting with influenza-like symptoms, 73 males and 93 females tested positive for Influenza A(H1N1) from end July to early September 2009 at the centre. Of the 118 patients who had chest radiographs, 56 were males and 62 were females. More than half of the patients (69/118) had normal chest radiographs. One of the patients who had a normal chest radiograph twice but remained symptomatic subsequently underwent a high-resolution CT (HRCT) examination a day after the second chest radiograph and the HRCT showed bi-apical fibrosis and ground-glass changes in the left lower lobe.