Some studies dealt with the influence of PD1 on autoimmune diabetes type 1, describing a disease modification after administration of anti-PD1 antibody (Kochupurakkal et al., 2014; El Khatib et al., 2015; Gaudy et al., 2015; Lee et al., 2015) or a correlation with genetic polymorphisms of PD1 (Lee et al., 2015). The gene discussed is PDCD1; the disease is autoimmune type 1 diabetes.