These efforts have demonstrated that a number of psychiatric disorders, including schizophrenia, bipolar disorder, and depression, are characterised by elevated concentrations of C-reactive protein (CRP), a non-specific biomarker of systemic bodily inflammation (Fernandes et al., 2016a, Fernandes et al., 2016b, Howren et al., 2009). The gene discussed is CRP; the disease is major depressive disorder.