Overview of the HIV epidemic in western, central, eastern and southern regions of sub-Saharan Africa
| Sub-regional country examples | Estimated number of adults (15+ years) living with HIV in 2009 | Prevalence among adults (15–49 years) in 2009 | Annual incidence among adults (15–49 years) in 2009 | Annual incidence among adults (15–49 years) in 2001 | Trend in incidence |
| N (95% CI) | Percentage (95% CI) | Incidence (95% CI) | Incidence (95% CI) | ||
| West Africa | |||||
| Côte d'Ivoire | 380 000 (340 000 to 440 000) | 3.4 (3.1 to 3.8) | 0.11 (<0.10 to 0.20) | 0.39 (0.30 to 0.51) | Decrease |
| Nigeria | 2 900 000 (2 600 000 to 3 200 000) | 3.6 (3.3 to 4.0) | 0.38 (0.33 to 0.44) | 0.39 (0.33 to 0.47) | Stable |
| Senegal | 54 000 (46 000 to 63 000) | 0.9 (0.7 to 1.0) | <0.10 (<0.10 to 0.11) | 0.10 (<0.10 to 0.12) | Stable |
| Central Africa | |||||
| Cameroon | 550 000 (500 000 to 610 000) | 5.3 (4.9 to 5.8) | 0.53 (0.43 to 0.61) | 0.59 (0.50 to 0.69) | Stable |
| Central African Republic | 110 000 (98 000 to 120 000) | 4.7 (4.2 to 5.2) | 0.17 (<0.1 to 0.25) | 0.56 (0.43 to 0.69) | Decrease |
| Republic of Congo | 69 000 (61 000 to 78 000) | 3.4 (3.1 to 3.8) | 0.28 (0.23 to 0.35) | 0.43 (0.36 to 0.51) | Decrease |
| Eastern Africa | |||||
| Kenya | 1 300 000 (1 200 000 to 1 400 000) | 6.3 (5.8 to 6.5) | 0.53 (0.34 to 0.70) | 0.55 (0.38 to 0.76) | Stable |
| United Republic of Tanzania | 1 200 000 (1 100 000 to 1 400 000) | 5.6 (5.3 to 6.1) | 0.45 (0.34 to 0.57) | 0.64 (0.55 to 0.76) | Decrease |
| Uganda | 1 000 000 (940 000 to 1 100 000) | 6.5 (5.9 to 6.9) | 0.74 (0.62 to 0.85) | 0.71 (0.61 to 0.82) | Stable |
| Southern Africa | |||||
| South Africa | 5 300 000 (5 100 000 to 5 500 000) | 17.8 (17.2 to 18.3) | 1.49 (1.27 to 1.76) | 2.35 (2.14 to 2.60) | Decrease |
| Swaziland | 170 000 (160 000 to 180 000) | 25.9 (24.9 to 27.0) | 2.66 (2.19 to 3.14) | 4.07 (3.72 to 4.46) | Decrease |
| Zimbabwe | 1 000 000 (950 000 to 1 200 000) | 14.3 (13.4 to 15.4) | 0.84 (0.54 to 1.19) | 1.94 (1.62 to 2.36) | Decrease |
This table has utilised data presented in the UNAIDS report on the global AIDS epidemic 2010.1 To calculate the adult HIV incidence, the estimated number of adults (15–49 years) newly infected with HIV in 2009 was divided by the 2009 adult population (15–49 years) not infected at the start of 2009 and similarly for 2001.