Giraudon et al corroborate that herpes C virus (HCV) is circulating among HIV positive men who have sex with men (MSM) in South East England.1 Earlier reports noted evidence of acute sexually transmitted infections among HIV positive men and of HCV infection among HIV positive men in other countries.2–4 Giraudon’s study is based on reports of HCV screening (of people with a history of HCV antibody tests) by 20 of 38 genitourinary clinics in London, Brighton and elsewhere in South East England, and an estimated denominator of person years at risk derived from routine surveillance of prevalent HIV infections from these clinics.1 The clinics reported …