IL6 and COVID-19: According to longitudinal cohort Post-hospitalization COVID-19 (PHOSP-COVID) studies in adults aged ≥18 years (n = 626 participants) across the UK, the inflammatory profiles associated with the increase in inflammatory cytokines, such as IL-6 concentrations, were observed in the plasma of both the very severe and the moderate SARS-CoV-2 infected patients at the 5-month visit after recovery (8).