XIX International AIDS Conference in Washington. Epidemiologist Christopher Beyrer from Johns Hopkins University talks about exclusion of injecting drug users, men who have sex with men and sex workers - in the global HIV/AIDS response.

XIX International AIDS Conference in Washington D.C. Interview with David Celentano from Johns Hopkins University in Baltimore. He talks about a project in Tanzania funded by USAID and working with combination prevention strategies.

XIX International AIDS Conference in Washington D.C. Session on drug policy with speakers from the political and scientific community. They talk about harm reduction and political leadership. Chaired by Christopher Beyrer from John Hopkins University.

Steve Gold, professor at John Hopkins University in the Department of Biological Chemistry, talks about the paradigms of the HIV/AIDS research fields.