Lastly, comparing the loss of the positive serology index from the first 6 weeks up to 6 months after the infection (not enough data were available to perform the statistical analysis at 9 months), in both cases and controls the trend of decrease of the IgG, IgM, and IgA index was significant from 4-6 weeks to 3 months and from 3 to 6 months after infection in each group. This evidence concerns the gene CD40LG and infection.