CRP and COVID-19: Several proteins have been identified as prognostic biomarkers in COVID-19 such as IL-6, IL-8, C-reactive protein (CRP), procalcitonin, ferritin, D-dimer, calprotectin, IFN-γ-induced protein 10 (IP-10), IFN-γ, TNF-α, granulocyte monocyte-colony stimulating factor (GM-CSF), and macrophage inflammatory protein (MIP) 1α and 1β (66–71).