CRP and lymphopenia: Recent studies suggest that several biomarkers including lymphopenia, and raised C-reactive protein (CRP), procalcitonin (PCT), D-dimer, creatine kinase (CK), aspartate aminotransferase (AST), alanine transaminase, creatinine and serum amyloid A are significantly associated with poor prognosis in COVID-19 patients [15,16,17].