Nature Medicine | Spoonful of Medicine

Experts hash out guidelines for HIV trials involving men who have sex with men

ROME — Last week’s encouraging results from two trials showing that prophylactic use of AIDS drugs in HIV-negative people can help prevent infection has underscored the value of studying new preventative treatments, particularly in high-risk groups. And one of the highest risk groups remains men who have sex with men — a term used to include men who might not self-identify as gay. In the US, for example, men who have sex with men (MSM) represent about 2% of the population, but they accounted for 59% of new HIV diagnoses in 2009. Strikingly, a global review estimated that only 3.3% 


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