Inclusion Criteria:  Age ≥18 years old Patients with covid-19 pneumonia confirmed by:  Reverse transcription polymerase chain reaction Or pattern of covid-19 in computed tomography (CT) scan ( ground-glass opacity indicative of pneumonia on CT, opinion on consolidation, etc) with laboratory investigations  Exclusion Criteria:  Patients not confirmed to be covid-19 with PCR or radiologically. Patients who are diagnosed as bacterial pneumonia.