What is preexposure HIV prophylaxis?

Updated: Oct 08, 2019
  • Author: Alejandro Delgado, MD; Chief Editor: Michael Stuart Bronze, MD  more...
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More than 2.5 million new HIV-1 infections occur yearly worldwide in the absence of an effective vaccine. Preexposure chemoprophylaxis with antiretroviral medications is a concept that has been widely recognized as a potential way to prevent new infections among those at risk. This article aims to give the rationale and discuss the potential of antiretroviral therapy (ART) to prevent transmission of HIV-1 infection.

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