CD8A and AIDS: Poor prognostic biomarkers typically remain abnormally elevated in many HIV-infected subjects; some of them independently predict all-cause mortality and non-AIDS morbidities including cardiovascular disease as well as immunosenescence (changes to the adaptive immune system that are seen in the very old), elevated levels of high sensitivity C-reactive protein (hs-CRP) and low CD4/CD8 ratio [2, 3].