IL10 and relapsing-remitting multiple sclerosis: IL-10-producing B cells from healthy donors, however, presented MBP85-99 as efficiently as the background B-cell population (Fig 5D), whereas IL-10-producing B cells from RRMS patients showed diminished capacity to present the peptide—both in comparison to the patients’ B-cell population as a whole and, with borderline significance, to IL-10-producing B cells from healthy donors.