We will take advantage of planned implementation of a pilot project for routine ART across four primary care centres in rural Zambia (Kafue District). Using a community-based survey modeled after the Demographic and Health Survey, we will measure HIV-free survival among children under two years of age in the catchment areas surrounding these pilot sites, both before and after implementation of services. We will use before-after comparisons in each of these four communities to better understand the incremental benefit of providing these services.