CRP and COVID-19: The positive correlation of elevated METRNβ levels with disease severity parameters such as D-dimer (32), CRP, LDH (33) and ALP (34), and that elevated METRNβ levels in parallel with the longitudinal elevation of multiple cytokines/chemokines for the pathogenic cytokine storm of COVID-19, show that METRNβ is a valuable prognostic marker of COVID-19.