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Prevalence in MSM Is Enhanced by Role Versatility

Prevalence in MSM Is Enhanced by Role Versatility
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Author(s): Andrés J. Cortés (University of Gothenburg, Sweden & Colombian Corporation for Agricultural Research, Colombia)
Copyright: 2018
Pages: 9
Source title: Big Data Analytics in HIV/AIDS Research
Source Author(s)/Editor(s): Ali Al Mazari (Alfaisal University, Saudi Arabia)
DOI: 10.4018/978-1-5225-3203-3.ch006


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In the community of men who have sex with men (MSM) the prevalence of the HIV-1 infection is still high. Promiscuity and condom fatigue are making unprotected anal intercourse (UAI) more common and sexually transmitted infections (STIs) presumably harder to track. Yet, MSM communities are peculiar in the sense that men can adopt fixed (insertive or receptive) or versatile (both practices) roles. Some old theoretical work predicted that the transmission of HIV-1 would be enhanced in MSM populations engaged more in role versatility than in role segregation, in which fixed roles are predominantly adopted. These predictions were based on the assumption that the probability of acquisition from unprotected insertive anal (UIA) sex was neglectable, which is an inappropriate assumption. This chapter shows that the increase of the HIV-1 prevalence among MSM due to role versatility holds under a stronger assumption of bidirectional virus transmission.

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