Compared to controls, cases were more likely to have hypertension (71% vs. 18%, p=0.001), lower CD4 counts [293(163–592) cells/μl vs. 533 (376–688) cells/μl, p=0.0001] and to be on second line ART (23% vs. 4%, p=0.001). The gene discussed is CD4; the disease is Hypertension.