XVIII International AIDS Conference in Vienna. Interview with Richard Marlink, Professor at Harvard School of Public Health. He talks about a symposium on the history of HIV/AIDS and future strategies for ending AIDS, that was planned in Boston in 2011.

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.