The heightened risk for HIV acquisition and transmission among FSW operates through a variety of behavioral and biological (or biomedical) risks (Kilmarx, 2009; Watts et al., 2010). Behavioral risk factors act at the level of the individual, with FSW demonstrating greater risk for HIV acquisition through high numbers of sexual partners and frequent concurrency of these partners (Baral, Beyer et al., 2012). Biologically, simply being female makes FSW eight times more likely to contract HIV in a single sexual act with an infected male partner than men are with an infected female partner (Wingood & DiClemente, 2000).