A study has found that inflammatory factors including IL-2, YKL40, IL-4, IL-6, IL-10, sCD40L, TNF-α, IL-1Ra, interferon-gamma (IFN-γ), and CRP, are associated with cognitive impairment in COVID-19 patients (Zhou et al. 2020a). The gene discussed is IFNG; the disease is Cognitive impairment.