Adding to this body of literature, it was demonstrated that 8 months after the index infection, an increased concentration of IL-1β, IL-6 and TNF-α showed a significant correlation with persistent symptoms [119] and that a combination of inflammatory markers including interferon (IFN)-β and IL-6 had a prognostic accuracy for long COVID of 79–82% [120]. The gene discussed is IL6; the disease is infection.