CRP and COVID-19: In support, elevated levels of IL-1β, IL-2, IL-6, IL-7, IL-8, IL-10, IFN-γ, interferon gamma-induced protein 10 (IP-10), granulocyte colony-stimulating factor (G-CSF), macrophage inflammatory protein 1α (MIP1α), serum ferritin, fibrinogen, plasminogen, C-reactive protein (CRP), and D-dimer have been observed in patients with COVID-19 (266, 269, 272, 273).