AIDS
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To illustrate the magnitude of the impact of AIDS on projections of mortality, to explain the reasons for the differences in projections by major international organizations and to provide a simple approach to estimating the impact of AIDS on life expectancy. ⋯ It is clear that AIDS has already increased mortality significantly in many countries and will continue to do so in the coming decades. Uncertainty about current and future levels of HIV prevalence among adults leads to differences in the projections of future AIDS-related mortality. As data and projection methodologies improve, the differences in projections may be reduced for sub-Saharan Africa, but the growing epidemic in some of the largest countries of Asia may increase uncertainty about future global impacts.