PWH who did not achieve viral load suppression were less likely to be measles seropositive than those who did (adjusted prevalence ratio 0.15, 95% CI: 0.06, 0.38), but no associations were observed in univariate analyses between measles seroprevalence and timing of HIV infection, antiretroviral treatment, and immunosuppression defined as CD4+ T-lymphocyte cell count below 200 cells/μl (Table S1, Supplemental Digital Content). Here, CD4 is linked to measles.