Substantial Proportion of Male HIV Infections Labelled as 'Heterosexual Exposure' in the UK Probably Due to Sex with Other Men

Up to a fifth of HIV infections among black African men initially classified as 'heterosexual exposure' in the UK are likely to have been acquired as a result of sex with other men, investigators report in the online edition of "AIDS". Using a technique called phylogenetic analysis, the authors identified clusters of HIV transmissions involving people diagnosed with HIV in the UK between 1996 and 2008. Overall, 29% of heterosexual people were in transmission clusters that only involved men who have sex with men (MSM). The authors estimate that overall 6% of HIV infections involving heterosexual men are misclassified and are actually the result of sex with other men. But the proportion of misclassified infections involving black African heterosexual men could be as high as 21%.

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