Besides IL-6, SARS-CoV-2 infection leads to the secretion of high amounts of IL-1β, IL-2, IL-4, IL-7, IL-10, monocyte chemoattractant protein (MCP)-1, and tumor necrosis factor (TNF)-α into the plasma of COVID-19 patients (3, 15–17). Here, IL6 is linked to COVID-19.