One way countries are adapting is by using data to follow the source of new infections, or ‘modes of transmission’, and then basing HIV prevention programmes on the evidence they find.

1. The last 100 HIV infections Each square below represents the last 100 HIV infections that were contracted in the following countries. Each colour represents a different mode of transmission. Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

2. The last 100 HIV infections Each square below represents the last 100 HIV infections that were contracted in the following countries. Each colour represents a different mode of transmission. Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

3. The last 100 HIV infections NIGERIA Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

4. The last 100 HIV infections CÔTE D’IVOIRE Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

5. The last 100 HIV infections LESOTHO Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

6. The last 100 HIV infections GHANA Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

7. The last 100 HIV infections KENYA Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

8. The last 100 HIV infections ZAMBIA Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

9. The last 100 HIV infections BENIN Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

10. The last 100 HIV infections BURKINA FASO Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

11. The last 100 HIV infections SWAZILAND Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

12. The last 100 HIV infections UGANDA Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

13. The last 100 HIV infections SENEGAL Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions

14. The last 100 HIV infections PERU Stable heterosexual couples Female sex workers Clients of female sex workers Partners of the clients of female sex workers Casual heterosexual sex Partners of casual heterosexual sex Prison population (only measured in Kenya) Other Injecting drug users Partners of injecting drug users Medical injections Men who have sex with men Female partners of men who have sex with men Blood transfusions