Until the HIV/AIDS epidemic, mortality levels were expected to continue to decline in all regions. However, this tendency has been reversed in coun- tries where HIV/AIDS is most prevalent, especially in sub-Saharan Africa. Life expectancy at birth is lower in the developing regions than in the more developed regions but it is projected to increase in both less and least develop- ing countries. This is dependent on successful implementation of HIV/AIDS prevention and treatment programs and on other health interventions. Migra- tion, both internal and international, also conditions the prospect for progress towards the MDGs
