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Author(s): Renee El-Krab [sup.1] , Natalie Brousseau [sup.2] , Seth C. Kalichman [sup.2] Author Affiliations: (1) https://ror.org/02der9h97, grid.63054.34, 0000 0001 0860 4915, Department of Psychological Sciences, University of Connecticut, , [...], Medical mistrust is fueled by conspiracy theories and histories of healthcare systems abuse and is a known determinant of health outcomes in minority populations. Plagued by multiple and pervasive conspiracy theories, HIV/AIDS has proven to be particularly hampered by medical mistrust. The current paper systematically reviews the literature on medical mistrust among people at risk for or living with HIV infection. The bulk of evidence from 17 studies supports medical mistrust as a barrier to HIV testing, engagement in prevention and care services, treatment uptake and adherence, and clinical outcomes. While findings mostly indicate that medical mistrust is a barrier to HIV prevention and care, some studies report null results and others suggest that medical mistrust may actually improve some HIV-related outcomes. Additionally, most of the reviewed literature was cross-sectional. Thus longitudinal, theory-driven research is needed to reconcile inconsistent findings and determine long term outcomes of medical mistrust. Interventions may then be developed to reduce the negative consequences associated with medical mistrust.