HIV transmission risk through anal intercourse: systematic review, meta-analysis and implications for HIV prevention

Published: April 20, 2010

Studies systematically reviewing much-needed estimates of human immunodeficiency virus (HIV) infectiousness for various modes of transmissionhave recently been published,1–4 partly in response
to discussions regarding the relative importance of each mode for HIV epidemics world wide.1,2 However, none has specifically focused on anal intercourse (AI), despite its role driving HIV epidemics
among men who has sex with men (MSM). AI may also contribute substantially to heterosexual epidemics in sub-Saharan Africa and elsewhere.3

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