Immunological aspects of COVID-19: What do we know?

Figure 2 The immune dysregulation and macrophage activation syndrome, caused by IL-1b- and IL-6-driven hyperactivation, accompanied by a decrease in many cell types, both leading to acute respiratory distress syndrome. CRP: C-reactive protein; HLA: Human leukocyte antigen; Ig: Immunoglobulin; IL: Interleukin; Th: T helper; TNFα: Tumor necrosis factor alpha.