Fig. 8

Dependence of the erythropoietic output on the levels of RBCs or on the severity of the anaemia. The erythropoietic output determined for each macaque is plotted against the RBC levels (a) and against the severity of the anaemia (b) for the same time points. Anaemia is calculated as the difference between the healthy RBC levels and the current level of RBCs of each macaque. Solid circles identify each experimental day, and some days are labelled with the corresponding time-stamp (in days post-infection) to allow visualization of the time dependence and direction. It is evident that there is no clear, direct correlation between the erythropoietic output and the number of RBCs