CD4 and neoplasm: The B, CD3 T, CD4 T, CD 8 T and NK cell portion of CCR5−/− mice tumor tissue were 7.2%, 48.2%, 16.9%, 32.1% and 7.8%, respectively, compared to 2.9%, 11.1%, 2.3%, 0.6% and 3.1% of CCR5+/+ mice (Figure 5C).