FIG. 1.

(A) Purity of CD4⁺ T cells was determined by flow cytometric analysis to ensure depletion of CD8⁺ T cells and NK cells. Data shown are averages of patient cohorts with standard deviations. Less than 1% CD8 or CD16 contamination was usually observed after purification. (B) Viability as determined by the percentage of cells in the lymphocyte forward and side scatter gates after infection with X4 and R5 virus and for uninfected controls. Data shown are averages of patient cohorts, i.e., uninfected donors, ES, and viremic patients.