Good correlation between percentage of switched memory B cells in peripheral blood and IgG synthesis in vitro.

The percentage of switched memory B cells (CD27⁺IgM⁻IgD⁻) in the peripheral blood and IgG production after SAC and IL-2 stimulation in vitro show a significant correlation (r = 0.81) when analyzed by linear regression. Healthy controls as well as CVID patients are included in this plot.