Panels A-D show viral loads for individual macaques in each immunization group. Proviral DNA (results shown in panels A,B,C) was evaluated on available PBMC samples collected post-challenge at weeks.1, 2, 3, 4, 6, 8, and monthly thereafter. PBMC obtained at 6 time points were assayed for each macaque where weeks tested are listed as 1-12. PBMC at 7 and 9 time points were assayed for each macaque where weeks tested are listed as 3-24 and 1-24, respectively.