CD40LG and infection: At present two different types of preparations obtained from plasma of healthy donors are available: polyclonal standard IgG (IVIG) and IgM-enriched formulation (IgGAM); IVIG contains at least 96% of polyclonal IgG whereas the composition of IgGAM, consisting in IgM 12%, IgA 12%, and IgG 76%, appears to trace more accurately the physiological antibodies' production in course of infection.