Figure 2From: Mechanisms of HIV non-progression; robust and sustained CD4+ T-cell proliferative responses to p24 antigen correlate with control of viraemia and lack of disease progression after long-term transfusion-acquired HIV-1 infectionImmunovirological status of the former non-progressors (same parameters as in figure 1). Initiation of antiretroviral therapy is defined by an arrow in the viral load panels. Other reasons for loss of non-progressor status are summarised in Additional file 1.Back to article page