So far, antiretroviral therapy (ART) for all HIV-infected people, irrespective of their CD4 levels or clinical status (equivalent to TasP), is only recommended in the USA. However, the World Health Organization (WHO) and the United Nations Programme on HIV/AIDS (UNAIDS) have recently changed their recommendations on HIV treatment initiation of HIV positive individuals, increasing the eligibility criteria to treat when CD4 levels reach 500 cells/mm3 compared to the previously recommended threshold of CD4<350 cells/mm3. However, these changes have so far not been widely implemented at the country-level. Despite the proven efficacy of TasP and PrEP as prevention strategies in clinical trials, their efficiency must be evaluated in 'real life' situations, in various countries with specific cultural contexts, largely because the uptake of HIV testing, the acceptance of early treatment and PrEP as well as drug adherence may vary considerably according to personal, social and cultural characteristics, as clearly reflected by the variability in PrEP trial results. The absence of clear recommendations on both prevention strategies in different countries is partly due to the lack of evidence based on real world implementation especially amongst FSWs. The investigators are thus proposing this demonstration project among FSWs in Cotonou, Benin, to identify the best way to successfully implement TasP and PrEP in this specific setting. Benin is facing a concentrated epidemic with HIV prevalence estimated at 1.2% in a recent general population household survey, whereas HIV prevalence was estimated at 21% among FSWs in the latest integrated biological and behavioural survey (IBBS) carried out in 2012.