IFNG and COVID-19: Most COVID-19 patients suffer a so-called “cytokine storm syndrome,” characterized by the release from cells of cytokines and signaling molecules such as the C-X-C motif chemokine 10 (CXCL10), interferon gamma (IFN-γ), interleukin 1 beta (IL-1β), IL-6, IL-8, IL-17, and tumor necrosis factor alpha (TNF-α) [26,27].