Background: Little is known about the effect of hepatitis C virus (HCV) treatment on sexual risk behavior among men who have sex with men (MSM) with HIV by treatment type (interferon [IFN]-based vs direct-acting antiviral [DAA]-based).
Setting: MSM with HIV and recently acquired HCV infection enrolled in the MSM Observational Study of Acute Infection with hepatitis C (MOSAIC) cohort.
Methods: Using data from 2009 to 2018, we evaluated risk behavior through a validated HCV risk score (where ≥2 indicated high risk) and its individual risk behaviors.