,6 Meta-analysis of cross-sectional studies confirms elevated concentrations of C-reactive protein (CRP), an acute phase protein and archetypal inflammatory marker, and inflammatory cytokines such as interleukin 6 (IL-6) in peripheral blood in patients with schizophrenia compared with controls, which tend to normalize after recovery but continue in treatment-resistant patients.7–9. Here, IL6 is linked to schizophrenia.