The B, CD3 T, CD4 T, CD 8 T and NK cell portion of the CCR5−/− mice spleen were 61.3%, 33.4%, 17.6%, 9.2% and 0.6%, respectively compared to 38.3%, 5.9%, 4.0%, 1.0% and 3.9% of the CCR5+/+ mice (Figure 5D).