Model input parameters: maternal characteristics and uptake of PMTCT services.

Age given as mean (SD) in years; CD4 counts given as mean (SD) in number/microliter. Maternal disease progression: details of the CEPAC model and data inputs describing maternal HIV disease progression with and without ART are provided in Text S1.aART eligibility defined as CD4≤350/µl or WHO stage 3/4 disease. In scenarios in which CD4 assays were not available, we simulated clinical assessment of ART eligibility. The sensitivity of clinical assessment of ART eligibility was reported for a CD4 threshold of 200/µl (36%); model sensitivity analyses using subsequent reports based on a CD4 threshold of 350/µl (sensitivity: 20%) did not substantially change the results [80].MACS, Multicenter AIDS Cohort Study; MOHCW, Zimbabwe Ministry of Health and Child Welfare.