To understand the impact of peripheral EBV infection on the expression of proinflammatory cytokines in the brain, we performed qPCR for tumor necrosis factor α (TNFα), interleukin-1β (IL1β), interleukin-2 (IL2) and interleukin-6 (IL6). The gene discussed is TNF; the disease is Epstein-Barr virus infection.