CRP and lymphopenia: These include neutrophilia and lymphopenia, particularly in older adults [11, 18, 20, 21]; neutrophil-to-lymphocyte ratio [22]; C-reactive protein (CRP) [13]; lymphocyte-to-CRP ratio [22]; markers of liver and cardiac injury such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), and cardiac troponin [23]; and elevated d-dimers, ferritin and fibrinogen [2, 6, 8].