Absolute numbers of CD4⁺ and CD8⁺ T cells in different organs.

Bars represent uninfected (white bars) and SIV-infected macaques with (dark gray bars) or without (light gray bars) signs of AIDS. In thymus, only CD3^high-expressing, CD4, CD8 single-positive, mature thymocytes were included. *Significantly different compared with uninfected monkeys (P ≤ .05).