Inclusion Criteria:  Patients older than 18 years of age who presented to our hospital's emergency clinic Patients with pre-diagnosis of severe covid pneumonia Patients starting methylprednisolone therapy.  Exclusion Criteria:  <18 years Patients with a pre-diagnosis of mild or moderate Covid 19 pneumonia Patients not hospitalized in our hospital Pregnant patients with Covid 19 pneumonia Patients whose 5-methylprednisolone treatment was started in the emergency and discontinued in less than 3 days