Monitoring of plasma SIV viral loads throughout the IL-7 treatment periods found that RM22657 maintained viral control, and RM24090 failed to suppress, while RM23201 (191 d.p.i), RM23686 (134 d.p.i) and RM23750 (134 d.p.i) lost viral control (at the indicated dates post-infection) (Fig 3B). The gene discussed is IL7; the disease is infection.