Fig. 4

A 27-year-old medical staff who contacted a COVID 19 positive patient and complained of dyspnea and fever. He was diagnosed to have COVID-19 confirmed by a positive RT-PCR test. The 1st CT (lung window) was done 2 days after the onset of the symptoms (a) revealed the presence of a bilateral lower lobar posterior and peripheral ill-defined veiling of ground-glass opacity. Follow-up CT (b) after 7 days from the onset of symptoms showed multi-lobar subpleural more defined multiple ground-glass patches which denoted disease progression. Peripheral subsegmental consolidative patches with fewer areas of ground-glass opacity were noted in (c) which was done after 12 days from the onset of symptoms (stage 3). (d) represented CT at the 4th stage after 18 days from the onset of symptoms revealed complete resolution of the previously noted features (negative CT)