We identified the same cytokines associated with COVID-19 severity (IL-6, IL-1RA, IL-10, MIG, IL-15, G-CSF, M-CSF, IP-10, TNF-α, IL-27) (Figures 3A, –C) as found in recent studies (18, 19, 22, 24, 35). Here, IL15 is linked to COVID-19.