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Summary: Background: Simplified hepatitis C virus (HCV) testing integrated into existing HIV services has the potential to improve HCV diagnoses and treatment. We evaluated the cost-effectiveness of integrating different simplified HCV testing strategies into existing HIV pre-exposure prophylaxis (PrEP) and treatment services among men who have sex with men (MSM) in Taiwan. Methods: Mathematical modeling was used to assess the cost-effectiveness of integrating simplified HCV tests (point-of-care antibody, reflex RNA, or immediate point-of-care RNA) with HCV treatment into existing HIV prevention and care for MSM from a healthcare perspective. The impact of increasing PrEP and HIV treatment coverage among MSM in combination with these HCV testing strategies was also considered. We reported lifetime costs (2022 US dollars) and quality-adjusted life years (QALYs) and calculated incremental cost-effectiveness ratios (ICERs) with a 3% annual discounting rate. Findings: Point-of-care HCV antibody and reflex RNA testing are cost-effective compared to current HCV testing in all PrEP and HIV treatment coverage scenarios (ICERs

Pre-exposure prophylaxis (PrEP) for prevention of human immunodeficiency virus infection is proved to be effective and has been implemented worldwide. This article introduces the guideline development and revised recommendations and guidance on PrEP provision in the updated Taiwan PrEP guideline. The Taiwan PrEP guideline writing group searched randomized controlled trials and guidelines published before October 2017 through Medline/PubMed, Cochrane Database, Embase and ClinicalTrials.gov database. Keywords included pre(-)exposure prophylaxis, PrEP, Truvada, tenofovir, HIV, and AIDS. Each selected article was assessed by two authors using the Grading of Recommendations Assessment, Development and Evaluation. External reviewers were invited to independently evaluate the revised manuscript per the Appraisal of Guidelines for Research and Evaluation II. Before publication, a public consultation was held to reach consensus on the updated guideline among providers, civil society, and Taiwan Centers for Disease Control. Four systematic reviews and 28 original articles were reviewed by Taiwan PrEP writing group. The second version of the Taiwan PrEP guideline was released in March 2018. We recommended daily PrEP use for the following populations: strong recommendation and high quality of evidence for men who have sex with men (MSM) and transgender women (TGW), as well as heterosexual serodiscordant couples; weak recommendation and high quality of evidence for people who inject drugs, while weak recommendation and moderate quality of evidence for at-risk heterosexual men and women. There is high-quality evidence for event-driven PrEP in MSM and likely TGW, and we additionally recognized these key populations could benefit from such dosing regimen. Keywords: Human immunodeficiency virus, Pre-exposure prophylaxis, PrEP, Taiwan