CD40LG and infection: The length of this delay is consistent with the period from infection to the time when the virion-antibody complexes were detected in plasma (Tomaras et al., 2008), and is significantly correlated (p = 0.0233, r = 0.87) with the time post-infection for anti-gp41 antibody (IgG+IgM) to be detectable in plasma (Figure 4).