Table 1. Average attributable fractions due to specific interactions (percentage of annual HIV incidence among female sex workers (FSWs) due to interactions with HSV-2).

	Best-fit attributable fraction (95% confidence intervals from all fits)
Specific interaction	% of HIV incidence among FSW due to specific interaction with HSV-2
All interactions combined	35.5 (22.2-62.5)
Increased susceptibility and infectivity of HIV in the presence of asymptomatic HSV-2 shedding alone	32.4 (20.4-59.5)
Increased susceptibility and infectivity of HIV in the presence of symptomatic HSV-2 recurrences alone	3.0 (1.4-4.3)
Increased susceptibility to HIV among HSV-2-infected FSWs	24.6 (11.2-46.7)
Increased infectivity of HIV from coinfected clients*	10.4 (2.3-32.5)

^*Includes implicitly the static effect on HIV transmission of the increased HSV-2 symptomatic recurrence rate among coinfected clients