FIG. 2.

Levels of HIV-1 p24 antigen after an inhibition test with supernatants from CD8⁺ cells of an HIV-1-infected long-term nonprogressor. The CD8⁺ cells were stimulated for a different period of time (0 to 16 h); supernatants were collected, and acutely infected H9 cells were incubated for 3, 6, or 9 days (3d, 6d, or 9d; see Materials and Methods). Percentage shows the highest inhibition of p24 antigen suppression against the medium control found at day 9. Time zero denotes 4-h supernatant without CD3 activation.