CD40LG and infection: Taken together, these findings indicate that, considering the kinetics of HCMV-specific IgM CLIA antibody, there are three groups of patients: (i) about 5% of women showing early clearance (within 3 months after onset of infection), (ii) about 35% of them testing IgM-positive for 6 months, and (iii) about 60% having a long-lasting IgM persistence (>6 months).