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.

Fernando Aiuti is an Italian Immunologist who has been working on HIV/AIDS since the early 80's. In this interview he talks about the Italian AIDS situation, sexuality education and the scientific and clinical work in the field.