CD40LG and infection: On the contrary, the analysis of sROC curves, their analogies, and the substantial correspondence of the AUCs from fixed- and random-effects models, hint towards a possible irrelevance of the actual serum levels for IgM/IgG, i.e., it is reasonable that subjects who developed a proper but somewhat scarce immune response to the virus, as well as patients in the very late phases of the infection (i.e., viral clearance) do not have an increased risk to be improperly diagnosed as negative when compared to patients in the proper “diagnostic open window”.