Predictors among our Severe COVID-19 patients by multivariable Cox hazard regression were treatment modality (lowest mortality and long overall survival [OS])in group C; history of comorbid diseases (DM, MI, CKD, COPD, asthma, and lung fibrosis); increased CRP and neutrophil-lymphocyte ratio (NLR); and shorter hospital, ICU, and MV stay (Table 5 and Figure 3). Here, CRP is linked to pulmonary fibrosis.