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.

Diane Johns is a nurse at San Francisco General Hospital. She shares her thoughts on terminal care, patient participation, home based care, homelessness, sex education and morality, stigma and other questions related to HIV and AIDS.