Immune status and immune responses. (A) Prevaccination lymphocyte subsets in the peripheral blood of untreated lymphoma patients (group A) and patients in remission (group B). Dashed lines indicate normal ranges. R indicates rituximab therapy. (B) Lymphocyte subsets of patients according to detection or absence of cellular (left and middle panels) or humoral immune responses (right panel). n.s. indicates not significant.