Among the asymptomatic infections, the geometric mean of IgM (median 0.56, 0.35-1.36) was 0.7 COI and the geometric mean of IgG (median 87.98, 55.88-135.55) was 71.47 AU/mL; while the geometric mean of IgM (median 0.57, 0.31-1.06) in recovering patients was 0.6 COI and the geometric mean of IgG (median 121.60, 92.61-218.14) was 135.42 AU/mL. This evidence concerns the gene CD40LG and infection.