In human LF patients, IgM and IgG antibodies have been detected with specificity to NP and GPC.63–65 In addition, mouse monoclonal antibody (mab) epitope mapping studies have identified several antibody targets in the viral NP, GP1 and GP266,67 of Josiah strain using IFA, radioimmunoprecipitation assay, and competition ELISA. The gene discussed is CD40LG; the disease is Lassa fever.