Three years after the first case of coronavirus disease 2019 , more than 500 million confirmed cases and more than 6 million deaths have been reported worldwide. 1 Immunodeficiency syndromes, comorbidities, frailty, and advanced age are risk factors for severe disease and mortality. 2 The case fatality rate has been reported as 8% in patients aged 70-79 years and 15% in those ≥80 years. 3 Initial clinical symptoms and key biochemical parameters have been associated with disease severity. Lymphopenia, elevated aspartate aminotransferase (AST), lactate dehydrogenase (LDH), creatine kinase (CK), and D-dimer have been reported as useful mortality markers. 4 The MuLBSTA risk score, which considers multilobular infiltration, hypo-lymphocytosis, bacterial co-infection, smoking history, hypertension, and age, was developed for patients with viral pneumonia in the pre-COVID period. 5 The sensitivity of this score has since been demonstrated for patients with COVID-19, with a cutoff