CRP and lymphopenia: Potential prognostic factors of intra-hospital mortality and intubation in patients hospitalized due to COVID-19-related hypoxemic ARF include older age [8, 9], male gender [9], diabetes [9], prothrombin time and D-dimer level [10], lymphocytopenia [11–13], leukopenia [11–13], C-reactive protein [11–13], lactate dehydrogenase [11–13], sequential organ failure assessment (SOFA) score [14], arterial oxygen pressure on inspired oxygen fraction ratio (PaO2/FiO2) [8, 14], and acute kidney injury [14].