Although HIV prevalence in West and Central Africa is relatively low compared to East and Southern Africa, many of these countries struggle to provide antiretroviral treatment, meaning that only 41% of adults and 26% of children were accessing treatment in 2017.
Nigeria has the second largest HIV epidemic in the world, with 3.1 million people living with HIV in 2017. However, the country's large population means that this equates to a low prevalence compared to some East and Southern African countries, of 2.8% in adults.
The Middle East and North Africa has one of the lowest HIV prevalences in the world, at <0.1%. It also has the lowest antiretroviral treatment coverage of any region, with only 29% of adults and 35% of children receiving treatment in 2017.