Pre-exposure prophylaxis (PrEP) is an experimental HIV-prevention strategy that proposes using antiretrovirals (ARVs) to reduce the risk of HIV infection in healthy uninfected people at risk of acquiring the virus. PrEP is not proven to work and is currently being tested in HIV-negative people in several clinical trials across the world. It is a controversial strategy that raises many hopes but also many questions (Updated May 1, 2010).

For further information check the PrEPWatch Website.