Figure 2
The percentage of new HIV infections that can be attributed to chlamydia. The percentage is plotted against four of the uncertain parameters: (a) the factor increase in susceptibility to HIV due to chlamydia; (b) the factor increase in HIV infectivity due to co-infection with chlamydia; (c) the probability of chlamydia transmission per act of unprotected anal intercourse (UAI); (d) the probability of HIV transmission per UAI act. In each plot, one point corresponds to one of the selected parameter sets: the value of the uncertain parameter in this set can be viewed on the horizontal axis, while the percentage of new HIV infections attributed to chlamydia (as calculated from the model with the specific parameter value) is shown on the vertical axis.