XIX International AIDS Conference in Washington D.C. Barton Haynes from the Duke Human Vaccine Institute (DHVI) has been working in the HIV vaccine field since 1985. Here he talks about the scientific difficulties of finding an HIV vaccine.

XVII International AIDS Conference in Mexico City. Ending of a panel session on the vaccine trials of the International AIDS Vaccine Initiative (IAVI). Seth Berkley, Alan Bernstein and Omu Anzala respond to questions from the audience.