IFNG and infection: In addition to IFN-γ, we also observed, using LEGENDplex assays, a smaller increase in IL-1β, IL-6, TNF-α, GM-CSF, and G-CSF secretion from patients with Long Covid, raising the possibility that other proinflammatory cytokines may be perturbed as well, as has been observed by others at 8 months after infection (19).