XVII International AIDS Conference in Mexico City. Interview with three pioneers in the HIV/AIDS response - Dr Mervyn Silverman, Dr Paul Volberding, and Dr Lars Olof Kallings. They talk about the history of the AIDS movement.

David Klatzmann is a french immunologist who has been working in an AIDS group in France since 1981. He talks about the discoveries that CD4-antigens function as receptors for the HIV virus and explains the structure of this relationship in detail.