Correlation between circulating IgM memory B-cells and CD4⁺ T-cells.

<p>(<b>A</b>) Scatter plots showing absolute IgM memory B-cell numbers & CD4⁺ T-cell counts and (<b>B</b>) % IgM memory B-cells & CD4⁺ T-cells measured using flow cytometry. The association between the two parameters (IgM memory B-cells and CD4 counts) was determined by Spearman’s correlation using Stata (Version 10). Each point represents the result from one subject. r_s is the Spearman rank correlation coefficient.