MBL levels were not significantly different among these three groups as shown in Figure 2b (median MBL in normals 1782.70 ng/ml vs HIV positive individuals (CD4 count >200 cells/μl) 2291.73 ng/ml vs AIDS patients 2651.74 ng/ml; Kruskall Wallis p = 0.70). Here, CD4 is linked to AIDS.