Clinical data

Chest CT scans of patients with Omicron variant infection admitted to Shanghai Xuhui Dahua Hospital were collected from April to May 2022. The inclusion criteria were patients with PCR-positive results (Ct value of < 40) and those with viral infection signs on chest CT within 48 h after PCR. The exclusion criteria were patients with bacterial infections, as determined using laboratory indexes, or those with a clinical or CT diagnosis of other basic pulmonary infectious diseases. This study complied with the ethical standards and was approved by the Ethics Committee of Shanghai Xuhui Dahua Hospital (approval No. 20220804).