Emerging evidence from human studies suggest that elevated levels of canonical pro-inflammatory cytokines such as interferon gamma (IFNγ) (Lesh et al., 2018, Warre-Cornish et al., 2020) and interleukin-1 beta (IL-1β) (Gilmore et al., 2004, Crampton et al., 2012) can be detected in the plasma of individuals with a diagnosis of schizophrenia (Goldsmith et al., 2016, Lesh et al., 2018). The gene discussed is IFNG; the disease is schizophrenia.