These women progressed to AIDS slightly faster than typical progressors, with a median time to CD4+ T cell counts below 200 mm3/uL of 6.0 years (S13 Fig and Table 1); time to CD4+ T cell counts below 200 mm3/uL was a median of 7.3 years in the 11 MACS participants studied herein [16]. Here, CD4 is linked to AIDS.