Background Since the start of the HIV epidemic, transactional sexual relationships have
been considered to present a high risk of HIV transmission to both the client and the person …

Along with other partners of key population groups, men who purchase sex (MWPS)
contributed to around 18% of new reported HIV cases in 2018 among people aged 15–49 …

Background Men who engage in transactional sex, the exchange of sex for money, goods,
or other items of value, are thought to be at increased risk of HIV, but there have been no …

Men who have sex with men (MSM) and purchase sex (MPS) are a sub-group potentially at
high risk for acquiring and transmitting sexually transmitted infections (STIs). This is a hard …

Background Commercial sex shares a role in HIV and sexually transmitted infections (STI)
transmission. Men who pay for sex (MPS) may transmit HIV/STI to other populations which …

We describe participants in the Bangkok Men who have sex with men Cohort Study (BMCS)
who sold or bought sex. Men who have sex with men (MSM) and transgender women …

Engagement in transactional sex has been hypothesized to increase risk of HIV among
MSM, however conflicting evidence exists. We conducted a systematic review and meta …

Background Key populations, including sex workers, are at high risk of HIV acquisition and
transmission. Men who pay for sex can contribute to HIV transmission through sexual …

Laws and policies can affect the HIV risk of key populations through a number of direct and
indirect pathways. We investigated the association between HIV prevalence among men …

Objectives To estimate the number of men who have sex with men and women who are HIV-
positive in the United States, and to compare HIV prevalence rates between men who have …