Preliminary search terms.

Healthcare workers (HCWs) and healthcare students are at increased risk of becoming infected with and being a vector of transmission of COVID-19. Vaccination efforts amongst this group of persons have been hampered in some countries by hesitancy to uptake the COVID-19 vaccine. The factors related to vaccine hesitancy have been reported in several systematic reviews. However, a comprehensive overview of barriers and facilitators of COVID-19 vaccine hesitancy is greatly needed to address effective interventions in this population. Understanding and designing effective strategies to promote vaccination among HCWs is pivotal to secure an appropriate and safe healthcare provision. The current protocol describes the methodology for an Umbrella Review that explores the barriers and facilitators of COVID-19 vaccine hesitancy for HCWs and healthcare students. The databases that will be searched are CINAHL, MedLine, Cochrane Library, PubMed, ProQuest, Web of Science, Science Direct, IBSS, Google Scholar, and Epistemonikos. Studies will be eligible for inclusion if they: (i) conducted a systematic review (with or without meta-analysis); (ii) included primary sources utilizing a quantitative methodology; (iii) investigated factors related to COVID-19 vaccine hesitancy; (iv) and included a sub/population of HCWs or healthcare students aged 18–65. The screening processes and data extraction will be conducted independently by two reviewers. The Joanna Briggs Institute (JBI) Critical Appraisal Checklist for Systematic Reviews and Research Syntheses will be used to assess the methodological quality of the included reviews. The degree to which the included reviews contain the same primary studies will also be assessed and reported. The outcomes of this review will have wide-reaching implications for the research area, healthcare systems and institutions, and governments worldwide.

医护人员（Healthcare workers, HCWs）与医学生感染COVID-19的风险显著升高，且可能作为病毒传播的媒介。部分国家中，该群体因对COVID-19疫苗接种存在疫苗犹豫（vaccine hesitancy），导致疫苗接种推广工作受阻。目前已有多项系统综述（systematic review）报道了与COVID-19疫苗犹豫相关的影响因素。然而，当前仍亟需针对该群体COVID-19疫苗犹豫的阻碍因素与促进因素开展全面综述，以制定针对性的有效干预策略。深入理解并制定针对医护人员群体的疫苗接种推广策略，对于保障优质且安全的医疗服务供给至关重要。本研究方案阐述了一项伞状综述（Umbrella Review）的研究方法，该综述旨在探究医护人员与医学生群体COVID-19疫苗犹豫的阻碍因素与促进因素。本研究将检索的数据库包括CINAHL、MedLine、Cochrane Library、PubMed、ProQuest、Web of Science、Science Direct、IBSS、Google Scholar及Epistemonikos。符合以下条件的研究将被纳入：(1) 为系统综述（可包含或不包含荟萃分析（meta-analysis））；(2) 采用定量研究方法纳入原始研究；(3) 探究与COVID-19疫苗犹豫相关的影响因素；(4) 研究对象包含年龄在18至65岁之间的医护人员或医学生亚群。文献筛选与数据提取工作将由两名评审员独立完成。本研究将采用乔安娜·布里格斯研究所（Joanna Briggs Institute, JBI）系统综述与研究综合临界评估清单，对纳入综述的方法学质量进行评价。同时，本研究还将评估并报告纳入的综述之间共享原始研究的重叠程度。本综述的研究结果将对全球范围内的相关研究领域、医疗体系与医疗机构以及各国政府产生深远影响。