Recovered COVID-19 patients had elevated levels of proinflammatory IL-17A, stem cell factor (SCF), IL-12p70, IL-1β, macrophage inflammatory protein-1 (MIP-1β), and pro-angiogenic macrophage inflammatory protein 1β, brain-derived neurotrophic factor, and vascular endothelial growth factor at 6 months after infection compared to subjects without disease [23]. Here, IL1B is linked to infection.