In Nigeria, an estimated 3.6 percent of the population are living with HIV and AIDS. Although HIV prevalence is much lower in Nigeria than in other African countries such as South Africa and Zambia, the size of Nigeria's population (around 149 million) means that by the end of 2009, there were 3.3 million people living with HIV.
Approximately 220,000 people died from AIDS in Nigeria in 2009. With AIDS claiming so many lives, Nigeria's life expectancy has declined significantly. In 1991 the average life expectancy was 54 years for women and 53 years for men. In 2009 these figures had fallen to 48 for women and 46 for men.