IL6 and COVID-19: Elevated inflammatory biomarkers like C-reactive protein (CRP) and proinflammatory cytokines like interleukin-2 (IL-2), interleukin-6 (IL-6), interleukin-10 (IL-10), gamma interferon (INF), and tumor necrosis factor-alpha (α-TNF) are higher in severe COVID-19 [9,10].