Although average IgM OD450 was also higher, (0.21 vs. 0.09) in patients that were IgG-positive so too was the IgM OD450 variation (SD = 0.28) compared to those negative (SD = 0.04), p < 0.05, producing non-significant differences in average values between infection groups, p = 0.36. The gene discussed is CD40LG; the disease is infection.