Quantitative immunoglobulins (Igs) and lymphocyte phenotyping for all patients enrolled on study. (A) IgG, IgA, and IgM levels. Lymphocyte subsets in (B) absolute and (C) percentage of total lymphocyte count; memory lymphocyte subsets in (D) absolute and (E) percentage of total lymphocyte count based on complete blood count with differential performed on the same day.