CD40LG and Epstein-Barr virus infection: Some patients with EBV infection had IgM antibodies to gangliosides GM1 (five of 11), GM2 (three of 11), and GD1a (two of 11).18 Nafissi et al in an investigation on Thirty five patients with GBS and 35 matched control population in the same period of time in Iran, found IgM antibody against CMV in 6 cases and 2 controls, IgG anti-Haemophilus influenzae (HI) in 34 patients and 31 controls andIgM antibody against EBV infection in one patient.