Proportion of studies reporting individual factors that affect vulnerability to HIV by region, overall and specifically among men who engage in transactional sex.

1<p>Including syphilis, gonorrhea, chlamydia, human papilloma virus (HPV), and/or herpes simplex virus (HSV);</p>2<p>Risk factor reported among any population in the study (i.e., men who have sex with men);</p>3<p>Risk factor reported specifically among men who engage in transactional sex;</p>4<p>Fisher’s exact test comparing frequency of reporting factors by geographic region of study, overall and among men who report transactional sex.