The hunt for an AIDS vaccine
Experts gathered this week in Vienna at an international AIDS conference, and there was good news about a vaginal gel that could prevent transmission of the HIV virus. But scientists are still looking for what some have called the Holy Grail of AIDS prevention: a vaccine. Epidemiologist Seth Berkley, founder of the International AIDS Vaccine Initiative, speaks at the 2010 Aspen Ideas Festival about the prospects for a vaccine.
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