Mr Subbarao is secretary of state for health in the Tamil Nadu Government in Chennai. In this interview he talks about the educational and medical work lead by the government. He talks particularly about empowering and educate women about HIV prevention.

Alec works as a manager in a harm reduction program and does street outreach work among young drug users in the streets of Moscow.

Helene Gayle is an AIDS expert who has been working in many different initiatives in the US, among them the Centers for Disease Control (CDC). She also works in President Obama's advisory group on HIV/AIDS. Here she talks about understanding and changing behaviors.