Over 90% of LGI1-antibody-positive encephalitis patients, of both East Asian and Caucasian extraction, have the HLA-DRB1*07:01allele [68–70], while patients with CASPR2-antibody encephalitis have a marked overrepresentation of HLA DRB1*11:0l [70]. This evidence concerns the gene HLA-DRB1 and viral encephalitis.