This month, a baby that was thought to be "cured" of HIV had the virus later detected in her blood, and the World Health Organization recommended that at-risk men should take Truvada, a drug that can prevent HIV infection. Anthony Fauci, head of the National Institute on Allergy and Infectious Diseases, and Antonio Urbina of Mount Sinai Hospital, discuss what these announcements mean for HIV/AIDS research and prevention.
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