Christina Dideriksen December 12, 2018 HIV Health and Wellness US: HIV-negative MSM on PrEP acquire sexually transmitted HCV Christina Dideriksen December 12, 2018 HIV Health and Wellness Researchers documented a small number of cases of sexually acquired hepatitis C virus infection among men who have sex with men, or MSM, taking pre-exposure prophylaxis, or PrEP, for HIV prevention.