High Quality Content by WIKIPEDIA articles! HIV/AIDS in Namibia is a critical public health issue. The prevalence of HIV in Namibia is among the highest in the world. Since 1996, HIV has been the leading cause of death in the country. Close to 17 per cent of the country’s children under the age of 18 are orphaned by at least one parent – mostly due to HIV. Consequently, life expectancy has declined since independence from 61 years (in 1991) to 49 years in 2001.