Fig. 1

The chest X-ray/computed tomographic (CT) images of the four patients on different time points. a–c Images from Case 1. The patient had normal CT images on 23 December 2019 after admission (a). However, on 24 January 2020, after onset of fever, CT scan showed interstitial abnormalities in both lower lung, which revealed the possibility of viral pneumonia (b). And these changes were ameliorated after treatment and showed on 30 January 2020 (c). d–e Images from Case 2. The CT images showed bilateral patchy shadowing in the patient after admission (d), and the lesion progressed 1 week later (e). f–h Images from Case 3. The CT scans taken on different time points, showed local patchy shadowing in right lung 6 days after admission (g), which is the time point of fever onset in this patient. And the lesion was recovered after treatment and showed on 30 January 2020 (H). i–m Images from Case 4. i–j The CT scans showed the multiple HCC lesions in the liver after transcatheter arterial chemoembolization therapy. The X-ray examination of the patient revealed normal lung after admission (k). However, on 2 February 2020 the images from X-ray showed bilateral patchy shadowing, indicating viral pneumonia (l). The patient has been in remission of the pneumonia despite right pleural effusion was showed by CT scan on 18 February 2020 (m)