Today's Show: How Promising is the HIV Vaccine?

4:30pm EST: A month ago, we heard news about a new HIV vaccine that would have some very positive results. Then we heard that it wasn't as promising as thought, deflating expectations. What's the reality? Prominent HIV rsearcher Elisabeth Pisani, author of The Wisdom of Whores - Bureaucrats, Brothels, and the Business of AIDS, says both takes are right, and joins us this afternoon to talk give her analysis to the latest vaccine..

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