Immune parameters that are closely linked to COVID-19 mortality, established by analysis of large numbers of deceased patients, include elevated levels of IL-6, D-dimer, c-reactive protein (CRP), serum ferritin, and lactate dehydrogenase (LDH), as well as decreased lymphocyte counts and hypoalbuminemia (Cummings et al., 2020; Huang J. et al., 2020; Huang W. et al., 2020; Ruan et al., 2020; Tian W. et al., 2020; Wu et al., 2020; Yan et al., 2020; Zhou F. et al., 2020). Here, IL6 is linked to COVID-19.