CD4 and HIV infectious disease: Among PWH, rubella seroprevalence did not differ significantly between those living in rural (96.0%) or urban (93.8%) settings, those receiving or not receiving antiretroviral therapy, those with recent or past HIV infection, those with CD4+ T-lymphocyte count greater or less than 200 cells/μl, or those with or without viral load suppression (Table S1, Supplemental Digital Content).