XIX International AIDS Conference. Interview with Gregg Alton from the Gilead Sciences, Inc. a pharmaceutical company working with health care services, policy makers, etc. to develop effective treatment, treatment as prevention and promoting access to care.

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.