There was an increase of TNF-α with age (t = 5.07, p < .001), but no effect of toxoplasmosis status (t = 1.00, p = .316), and no interaction of both (ΔR2 = .03 %, F (1, 269) = 1.07, p = .302). The gene discussed is TNF; the disease is toxoplasmosis.