1. All patients diagnosed with COVID 19 based on positive result on SARS-CoV2 RT-PCR or CBNAAT from nasopharyngeal or oropharyngeal swab or secretions. <br/ >2. More than two weeks, but less than six weeks have lapsed after the above diagnostic positive result. <br/ >3. A repeat nasopharyngeal or oropharyngeal swab test (either SARS-CoV2 RT-PCR or CBNAAT) performed at two weeks or later, after earlier positive result, is now negative. <br/ >4. CT scan of thorax performed after two weeks and less than six weeks after the first positive result, shows features of organizing pneumonia. <br/ > <br/ >Organizing pneumonia on CT scan of thorax is diagnosed when, one or more of the following features are identified on the CT scan images of thorax: <br/ >1.Unilateral or bilateral basal subpleural lobar, segmental or perilobular consolidation <br/ >2.Halo sign <br/ >3.Reverse halo sign or atoll sign <br/ >4.Target sign or bulls-eye sign or double halo sign <br/ >

1. All patients diagnosed with COVID 19 based on positive result on SARS-CoV2 RT-PCR or CBNAAT from nasopharyngeal or oropharyngeal swab or secretions. <br/ >2. More than two weeks, but less than six weeks have lapsed after the above diagnostic positive result. <br/ >3. A repeat nasopharyngeal or oropharyngeal swab test (either SARS-CoV2 RT-PCR or CBNAAT) performed at two weeks or later, after earlier positive result, is now negative. <br/ >4. CT scan of thorax performed after two weeks and less than six weeks after the first positive result, shows features of organizing pneumonia. <br/ > <br/ >Organizing pneumonia on CT scan of thorax is diagnosed when, one or more of the following features are identified on the CT scan images of thorax: <br/ >1.Unilateral or bilateral basal subpleural lobar, segmental or perilobular consolidation <br/ >2.Halo sign <br/ >3.Reverse halo sign or atoll sign <br/ >4.Target sign or bulls-eye sign or double halo sign <br/ >

1. All patients diagnosed with COVID 19 based on positive result on SARS-CoV2 RT-PCR or CBNAAT from nasopharyngeal or oropharyngeal swab or secretions. <br/ >2. More than two weeks, but less than six weeks have lapsed after the above diagnostic positive result. <br/ >3. A repeat nasopharyngeal or oropharyngeal swab test (either SARS-CoV2 RT-PCR or CBNAAT) performed at two weeks or later, after earlier positive result, is now negative. <br/ >4. CT scan of thorax performed after two weeks and less than six weeks after the first positive result, shows features of organizing pneumonia. <br/ > <br/ >Organizing pneumonia on CT scan of thorax is diagnosed when, one or more of the following features are identified on the CT scan images of thorax: <br/ >1.Unilateral or bilateral basal subpleural lobar, segmental or perilobular consolidation <br/ >2.Halo sign <br/ >3.Reverse halo sign or atoll sign <br/ >4.Target sign or bulls-eye sign or double halo sign <br/ >

1. All patients diagnosed with COVID 19 based on positive result on SARS-CoV2 RT-PCR or CBNAAT from nasopharyngeal or oropharyngeal swab or secretions. <br/ >2. More than two weeks, but less than six weeks have lapsed after the above diagnostic positive result. <br/ >3. A repeat nasopharyngeal or oropharyngeal swab test (either SARS-CoV2 RT-PCR or CBNAAT) performed at two weeks or later, after earlier positive result, is now negative. <br/ >4. CT scan of thorax performed after two weeks and less than six weeks after the first positive result, shows features of organizing pneumonia. <br/ > <br/ >Organizing pneumonia on CT scan of thorax is diagnosed when, one or more of the following features are identified on the CT scan images of thorax: <br/ >1.Unilateral or bilateral basal subpleural lobar, segmental or perilobular consolidation <br/ >2.Halo sign <br/ >3.Reverse halo sign or atoll sign <br/ >4.Target sign or bulls-eye sign or double halo sign <br/ >