Incidence and characteristics of sexually transmitted acute hepatitis C virus infection among HIV-positive men who have sex with men in Copenhagen, Denmark during four years (2006-2009): a retrospective cohort study.

We determined the incidence of hepatitis C virus among Danish human immunodeficiency virus (HIV)-positive men who have sex with men (MSM) and described their characteristics. We included 871 HIV-positive MSM seen from 1 January 2006 to 31 December 2009 at Rigshospitalet in Copenhagen; drug users were excluded. We found 13 incident infections, i.e. a yearly incidence of 0.4%.