Figure 3:

Schematic representations of the association between CD8+ T cell frequency and SIV viral load. A. The initiation of ART in the absence or presence of CD8+ T cells during SIV infection results in similar decay rates of plasma viremia. B. Viral load increases when CD8+ T cells are absent during short-term ART. C. Viral load does not increase when CD4+ T cells are absent during short-term ART. Abbreviations: SIV: Simian immunodeficiency virus; CD: cluster of differentiation; ART: Antiretroviral therapy; P.I.: post-infection.