A significant change in cytokine (including IFN-α, β, and γ; IL-2, IL-6, IL-7, IL-12, and IL-1β) and chemokine (including CCL 2, 3, and 5; CXCL10, CXCL9, and CXCL8) levels in severe COVID-19 cases was also found [172]. Here, IL2 is linked to COVID-19.