Chest CT of SARS-CoV-2 reactivation patient. A 30-year-old male patient was negative for PCR at 2 weeks’ follow-up but reverted to positive for RT-PCR at 4 weeks. The range of ground-glass opacities in the left upper lobe narrowed and the density increased slightly, while the density of ground-glass opacities in the lower right lobe decreased. R: right