title: A study of men who have sex with men and who were recently infected with HIV.
mesh_terms: D004739:England; D015658:HIV Infections / Q000517:prevention & control / Q000635:transmission*; D007722:Health Knowledge, Attitudes, Practice; D006716:Homosexuality / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D012725:Sexual Behavior; D014852:Wales