IL6 and COVID-19: With this in mind, a growing body of evidence suggests that severe forms COVID-19 are associated with pronounced lymphopenia, lymphocyte dysfunction and activation, monocyte and granulocyte abnormalities, cytokine storm (increased levels of IL-1β, IL-6, IL-2, IL-8, IL-17, IP10, MCP1, MIP1α, G-CSF, GM-CSF, and TNF-α), high levels of C-reactive protein (CRP), D-dimer, immunoglobulin G (IgG), and total antibodies (4–7).