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.

Luc Montagnier talks about the complex virology of HIV which makes the AIDS vaccine development so difficult. He also talks about the economic and cultural advantages of using traditional medicine as a part of the ARV therapy in developing countries.