BACKGROUND: Within an ongoing HIV/STD prevention project aimed at female sex workers (FSW) in Cotonou, Benin, we evaluated time trends in HIV and STD prevalences from 1993 to 1999. DESIGN: Three serial cross-sectional surveys were conducted in 1993 (n = 374), 1995-1996 (n = 365), and 1998-1999 (n = ...
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