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.

Praphan Phanupak, co-founder of the Thai Red Cross AIDS Research Center (TRC-ARC) and Professor at the Chulalongkorn University Hospital, tells about his encounter with the first AIDS patient in Thailand, about the health resources in Thailand and about stigma.

Jonathan Mann, was a US medical doctor and influential within the World Health Organization (WHO). Here he talks about the global understanding of the disease between 1981 and 1988.